31311022231120 has 320 divisors, whose sum is σ = 77709586268160. Its totient is φ = 11699520768000.

The previous prime is 31311022231103. The next prime is 31311022231147. The reversal of 31311022231120 is 2113222011313.

It is a super-2 number, since 2×31311022231120² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31311022231091 and 31311022231100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23595343897 + ... + 23595345223.

It is an arithmetic number, because the mean of its divisors is an integer number (242842457088).

Almost surely, 2^{31311022231120} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31311022231120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38854793134080).

31311022231120 is an abundant number, since it is smaller than the sum of its proper divisors (46398564037040).

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

31311022231120 is a wasteful number, since it uses less digits than its factorization.

31311022231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31311022231120 its reverse (2113222011313), we get a palindrome (33424244242433).

The spelling of 31311022231120 in words is "thirty-one trillion, three hundred eleven billion, twenty-two million, two hundred thirty-one thousand, one hundred twenty".