31121041024 has 32 divisors (see below), whose sum is σ = 65645950500. Its totient is φ = 14645194752.

The previous prime is 31121040967. The next prime is 31121041037. The reversal of 31121041024 is 42014012113.

It can be written as a sum of positive squares in 2 ways, for example, as 30753935424 + 367105600 = 175368^2 + 19160^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 31121040992 and 31121041010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7148799 + ... + 7153150.

Almost surely, 2^31121041024 is an apocalyptic number.

31121041024 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31121041024 is an abundant number, since it is smaller than the sum of its proper divisors (34524909476).

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

31121041024 is a wasteful number, since it uses less digits than its factorization.

31121041024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14301980 (or 14301968 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31121041024 its reverse (42014012113), we get a palindrome (73135053137).

The spelling of 31121041024 in words is "thirty-one billion, one hundred twenty-one million, forty-one thousand, twenty-four".