31864121012 has 12 divisors (see below), whose sum is σ = 55774162080. Its totient is φ = 15928646136.

The previous prime is 31864121011. The next prime is 31864121017. The reversal of 31864121012 is 21012146813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31864121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832538 + ... + 869969.

It is an arithmetic number, because the mean of its divisors is an integer number (4647846840).

Almost surely, 2^31864121012 is an apocalyptic number.

It is an amenable number.

31864121012 is a deficient number, since it is larger than the sum of its proper divisors (23910041068).

31864121012 is a wasteful number, since it uses less digits than its factorization.

31864121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707190 (or 1707188 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

Adding to 31864121012 its reverse (21012146813), we get a palindrome (52876267825).

The spelling of 31864121012 in words is "thirty-one billion, eight hundred sixty-four million, one hundred twenty-one thousand, twelve".