31220023211022 has 16 divisors (see below), whose sum is σ = 64593151471440. Its totient is φ = 10047823562112.

The previous prime is 31220023211021. The next prime is 31220023211123. The reversal of 31220023211022 is 22011232002213.

It is a self number, because there is not a number n which added to its sum of digits gives 31220023211022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220023211021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89712710203 + ... + 89712710550.

It is an arithmetic number, because the mean of its divisors is an integer number (4037071966965).

Almost surely, 2^{31220023211022} is an apocalyptic number.

31220023211022 is an abundant number, since it is smaller than the sum of its proper divisors (33373128260418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220023211022 is a wasteful number, since it uses less digits than its factorization.

31220023211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179425420787.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31220023211022 its reverse (22011232002213), we get a palindrome (53231255213235).

The spelling of 31220023211022 in words is "thirty-one trillion, two hundred twenty billion, twenty-three million, two hundred eleven thousand, twenty-two".