31123310121310 has 512 divisors, whose sum is σ = 67230556968960. Its totient is φ = 10265149440000.

The previous prime is 31123310121301. The next prime is 31123310121469. The reversal of 31123310121310 is 1312101332113.

It is a super-2 number, since 2×31123310121310² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 101378860177 + ... + 101378860483.

It is an arithmetic number, because the mean of its divisors is an integer number (131309681580).

Almost surely, 2^{31123310121310} is an apocalyptic number.

31123310121310 is an abundant number, since it is smaller than the sum of its proper divisors (36107246847650).

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

31123310121310 is a wasteful number, since it uses less digits than its factorization.

31123310121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31123310121310 its reverse (1312101332113), we get a palindrome (32435411453423).

The spelling of 31123310121310 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred ten million, one hundred twenty-one thousand, three hundred ten".