31311012233020 has 96 divisors (see below), whose sum is σ = 71413694263296. Its totient is φ = 11462994028800.

The previous prime is 31311012232993. The next prime is 31311012233047. The reversal of 31311012233020 is 2033221011313.

It is an interprime number because it is at equal distance from previous prime (31311012232993) and next prime (31311012233047).

It is a junction number, because it is equal to n+sod(n) for n = 31311012232982 and 31311012233000.

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, 14218735 + ... + 16272505.

It is an arithmetic number, because the mean of its divisors is an integer number (743892648576).

Almost surely, 2^{31311012233020} 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 31311012233020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35706847131648).

31311012233020 is an abundant number, since it is smaller than the sum of its proper divisors (40102682030276).

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

31311012233020 is a wasteful number, since it uses less digits than its factorization.

31311012233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054291 (or 2054289 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31311012233020 its reverse (2033221011313), we get a palindrome (33344233244333).

The spelling of 31311012233020 in words is "thirty-one trillion, three hundred eleven billion, twelve million, two hundred thirty-three thousand, twenty".