31303222012 has 6 divisors (see below), whose sum is σ = 54780638528. Its totient is φ = 15651611004.

The previous prime is 31303222009. The next prime is 31303222063. The reversal of 31303222012 is 21022230313.

It is a super-2 number, since 2×31303222012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3912902748 + ... + 3912902755.

Almost surely, 2^31303222012 is an apocalyptic number.

It is an amenable number.

31303222012 is a deficient number, since it is larger than the sum of its proper divisors (23477416516).

31303222012 is a wasteful number, since it uses less digits than its factorization.

31303222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7825805507 (or 7825805505 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31303222012 its reverse (21022230313), we get a palindrome (52325452325).

The spelling of 31303222012 in words is "thirty-one billion, three hundred three million, two hundred twenty-two thousand, twelve".