31234421022 has 64 divisors (see below), whose sum is σ = 72697497600. Its totient is φ = 8762307840.

The previous prime is 31234420999. The next prime is 31234421051. The reversal of 31234421022 is 22012443213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31234420983 and 31234421001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 574554 + ... + 626562.

It is an arithmetic number, because the mean of its divisors is an integer number (1135898400).

Almost surely, 2^31234421022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31234421022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36348748800).

31234421022 is an abundant number, since it is smaller than the sum of its proper divisors (41463076578).

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

31234421022 is a wasteful number, since it uses less digits than its factorization.

31234421022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52281.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31234421022 its reverse (22012443213), we get a palindrome (53246864235).

The spelling of 31234421022 in words is "thirty-one billion, two hundred thirty-four million, four hundred twenty-one thousand, twenty-two".