31020002123112 has 48 divisors (see below), whose sum is σ = 84012782445540. Its totient is φ = 10339966652928.

The previous prime is 31020002123101. The next prime is 31020002123113. The reversal of 31020002123112 is 21132120002013.

31020002123112 is a `hidden beast` number, since 310 + 20 + 0 + 0 + 21 + 2 + 311 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30728019677796 + 291982445316 = 5543286^2 + 540354^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31020002123113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31203358 + ... + 32182130.

Almost surely, 2^{31020002123112} is an apocalyptic number.

It is an amenable number.

31020002123112 is an abundant number, since it is smaller than the sum of its proper divisors (52992780322428).

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

31020002123112 is a wasteful number, since it uses less digits than its factorization.

31020002123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418962 (or 1418955 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31020002123112 its reverse (21132120002013), we get a palindrome (52152122125125).

The spelling of 31020002123112 in words is "thirty-one trillion, twenty billion, two million, one hundred twenty-three thousand, one hundred twelve".