31121101044 has 60 divisors (see below), whose sum is σ = 88752779808. Its totient is φ = 9430635600.

The previous prime is 31121101031. The next prime is 31121101079. The reversal of 31121101044 is 44010112113.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4362472 + ... + 4369599.

Almost surely, 2^31121101044 is an apocalyptic number.

It is an amenable number.

31121101044 is an abundant number, since it is smaller than the sum of its proper divisors (57631678764).

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

31121101044 is a wasteful number, since it uses less digits than its factorization.

31121101044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8732098 (or 8732087 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31121101044 its reverse (44010112113), we get a palindrome (75131213157).

The spelling of 31121101044 in words is "thirty-one billion, one hundred twenty-one million, one hundred one thousand, forty-four".