31224222012 has 48 divisors (see below), whose sum is σ = 74814468512. Its totient is φ = 10131886080.

The previous prime is 31224222011. The next prime is 31224222067. The reversal of 31224222012 is 21022242213.

It is a self number, because there is not a number n which added to its sum of digits gives 31224222012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224222011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148873 + ... + 290880.

Almost surely, 2^31224222012 is an apocalyptic number.

It is an amenable number.

31224222012 is an abundant number, since it is smaller than the sum of its proper divisors (43590246500).

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

31224222012 is a wasteful number, since it uses less digits than its factorization.

31224222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439918 (or 439916 counting only the distinct ones).

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

Adding to 31224222012 its reverse (21022242213), we get a palindrome (52246464225).

The spelling of 31224222012 in words is "thirty-one billion, two hundred twenty-four million, two hundred twenty-two thousand, twelve".