31020320130101 has 4 divisors (see below), whose sum is σ = 31257116467104. Its totient is φ = 30783523793100.

The previous prime is 31020320130097. The next prime is 31020320130161. The reversal of 31020320130101 is 10103102302013.

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 31020320130101 - 2² = 31020320130097 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 31020320130101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020320130161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118398168305 + ... + 118398168566.

It is an arithmetic number, because the mean of its divisors is an integer number (7814279116776).

Almost surely, 2^{31020320130101} is an apocalyptic number.

It is an amenable number.

31020320130101 is a deficient number, since it is larger than the sum of its proper divisors (236796337003).

31020320130101 is a wasteful number, since it uses less digits than its factorization.

31020320130101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236796337002.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31020320130101 its reverse (10103102302013), we get a palindrome (41123422432114).

The spelling of 31020320130101 in words is "thirty-one trillion, twenty billion, three hundred twenty million, one hundred thirty thousand, one hundred one".