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31020223002101 = 129232400388687
BaseRepresentation
bin1110000110110011101010…
…10111110111010111110101
311001211111121200021010120222
413003121311113313113311
513031213404042031401
6145550254350504125
76351065021001104
oct703316527672765
9131744550233528
1031020223002101
11997a66a209823
12358bb15b05045
13144026b361708
1479355b56803b
1538bd91b5ac1b
hex1c36755f75f5

31020223002101 has 4 divisors (see below), whose sum is σ = 31022623403712. Its totient is φ = 31017822600492.

The previous prime is 31020223002079. The next prime is 31020223002143. The reversal of 31020223002101 is 10120032202013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31020223002101 - 26 = 31020223002037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020223002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020223007101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200181421 + ... + 1200207266.

It is an arithmetic number, because the mean of its divisors is an integer number (7755655850928).

Almost surely, 231020223002101 is an apocalyptic number.

It is an amenable number.

31020223002101 is a deficient number, since it is larger than the sum of its proper divisors (2400401611).

31020223002101 is a wasteful number, since it uses less digits than its factorization.

31020223002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400401610.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31020223002101 its reverse (10120032202013), we get a palindrome (41140255204114).

The spelling of 31020223002101 in words is "thirty-one trillion, twenty billion, two hundred twenty-three million, two thousand, one hundred one".

Divisors: 1 12923 2400388687 31020223002101