31100023211985 has 96 divisors (see below), whose sum is σ = 69263055550080. Its totient is φ = 13123526242176.

The previous prime is 31100023211963. The next prime is 31100023212043. The reversal of 31100023211985 is 58911232000113.

31100023211985 is a `hidden beast` number, since 311 + 0 + 0 + 0 + 2 + 321 + 19 + 8 + 5 = 666.

It is not a de Polignac number, because 31100023211985 - 2⁸ = 31100023211729 is a prime.

It is a super-2 number, since 2×31100023211985² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 180738607 + ... + 180910596.

It is an arithmetic number, because the mean of its divisors is an integer number (721490161980).

Almost surely, 2^{31100023211985} is an apocalyptic number.

31100023211985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31100023211985 is an abundant number, since it is smaller than the sum of its proper divisors (38163032338095).

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

31100023211985 is a wasteful number, since it uses less digits than its factorization.

31100023211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361649244 (or 361649231 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 31100023211985 in words is "thirty-one trillion, one hundred billion, twenty-three million, two hundred eleven thousand, nine hundred eighty-five".