31020122220101 has 4 divisors (see below), whose sum is σ = 35451568251552. Its totient is φ = 26588676188652.

The previous prime is 31020122220049. The next prime is 31020122220119. The reversal of 31020122220101 is 10102222102013.

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 31020122220101 - 2⁶ = 31020122220037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020122220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020122220301) 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, 2215723015715 + ... + 2215723015728.

It is an arithmetic number, because the mean of its divisors is an integer number (8862892062888).

Almost surely, 2^{31020122220101} is an apocalyptic number.

It is an amenable number.

31020122220101 is a deficient number, since it is larger than the sum of its proper divisors (4431446031451).

31020122220101 is an equidigital number, since it uses as much as digits as its factorization.

31020122220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431446031450.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31020122220101 its reverse (10102222102013), we get a palindrome (41122344322114).

The spelling of 31020122220101 in words is "thirty-one trillion, twenty billion, one hundred twenty-two million, two hundred twenty thousand, one hundred one".