31020421224 has 64 divisors (see below), whose sum is σ = 83538383040. Its totient is φ = 9542246400.

The previous prime is 31020421151. The next prime is 31020421247. The reversal of 31020421224 is 42212402013.

It is a self number, because there is not a number n which added to its sum of digits gives 31020421224.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1440424 + ... + 1461800.

It is an arithmetic number, because the mean of its divisors is an integer number (1305287235).

Almost surely, 2^31020421224 is an apocalyptic number.

It is an amenable number.

31020421224 is an abundant number, since it is smaller than the sum of its proper divisors (52517961816).

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

31020421224 is a wasteful number, since it uses less digits than its factorization.

31020421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26050 (or 26046 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 31020421224 its reverse (42212402013), we get a palindrome (73232823237).

The spelling of 31020421224 in words is "thirty-one billion, twenty million, four hundred twenty-one thousand, two hundred twenty-four".