31120021110012 has 96 divisors (see below), whose sum is σ = 73966940812800. Its totient is φ = 10180736966400.

The previous prime is 31120021110007. The next prime is 31120021110053. The reversal of 31120021110012 is 21001112002113.

It is a junction number, because it is equal to n+sod(n) for n = 31120021109973 and 31120021110000.

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, 2083132039 + ... + 2083146977.

It is an arithmetic number, because the mean of its divisors is an integer number (770488966800).

Almost surely, 2^{31120021110012} is an apocalyptic number.

It is an amenable number.

31120021110012 is an abundant number, since it is smaller than the sum of its proper divisors (42846919702788).

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

31120021110012 is a wasteful number, since it uses less digits than its factorization.

31120021110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107 (or 21105 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31120021110012 its reverse (21001112002113), we get a palindrome (52121133112125).

The spelling of 31120021110012 in words is "thirty-one trillion, one hundred twenty billion, twenty-one million, one hundred ten thousand, twelve".