31212302012 has 24 divisors (see below), whose sum is σ = 57339179520. Its totient is φ = 14846744880.

The previous prime is 31212301987. The next prime is 31212302021. The reversal of 31212302012 is 21020321213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125838 + ... + 2140469.

It is an arithmetic number, because the mean of its divisors is an integer number (2389132480).

Almost surely, 2^31212302012 is an apocalyptic number.

It is an amenable number.

31212302012 is a deficient number, since it is larger than the sum of its proper divisors (26126877508).

31212302012 is a wasteful number, since it uses less digits than its factorization.

31212302012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266401 (or 4266399 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31212302012 its reverse (21020321213), we get a palindrome (52232623225).

The spelling of 31212302012 in words is "thirty-one billion, two hundred twelve million, three hundred two thousand, twelve".