31020120212 has 12 divisors (see below), whose sum is σ = 54294485280. Its totient is φ = 15507410136.

The previous prime is 31020120113. The next prime is 31020120227. The reversal of 31020120212 is 21202102013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636038 + ... + 683069.

It is an arithmetic number, because the mean of its divisors is an integer number (4524540440).

Almost surely, 2^31020120212 is an apocalyptic number.

It is an amenable number.

31020120212 is a deficient number, since it is larger than the sum of its proper divisors (23274365068).

31020120212 is a wasteful number, since it uses less digits than its factorization.

31020120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324990 (or 1324988 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31020120212 its reverse (21202102013), we get a palindrome (52222222225).

The spelling of 31020120212 in words is "thirty-one billion, twenty million, one hundred twenty thousand, two hundred twelve".