31123321104120 has 256 divisors, whose sum is σ = 114533252259840. Its totient is φ = 6603718606848.

The previous prime is 31123321104101. The next prime is 31123321104163. The reversal of 31123321104120 is 2140112332113.

It is a super-2 number, since 2×31123321104120² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 13885672 + ... + 15970551.

It is an arithmetic number, because the mean of its divisors is an integer number (447395516640).

Almost surely, 2^{31123321104120} is an apocalyptic number.

31123321104120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31123321104120 is an abundant number, since it is smaller than the sum of its proper divisors (83409931155720).

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

31123321104120 is a wasteful number, since it uses less digits than its factorization.

31123321104120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29856334 (or 29856330 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31123321104120 its reverse (2140112332113), we get a palindrome (33263433436233).

The spelling of 31123321104120 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred twenty-one million, one hundred four thousand, one hundred twenty".