31210122012 has 12 divisors (see below), whose sum is σ = 72823618056. Its totient is φ = 10403374000.

The previous prime is 31210122001. The next prime is 31210122023. The reversal of 31210122012 is 21022101213.

It is an interprime number because it is at equal distance from previous prime (31210122001) and next prime (31210122023).

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31210121982 and 31210122000.

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, 1300421739 + ... + 1300421762.

It is an arithmetic number, because the mean of its divisors is an integer number (6068634838).

Almost surely, 2^31210122012 is an apocalyptic number.

It is an amenable number.

31210122012 is an abundant number, since it is smaller than the sum of its proper divisors (41613496044).

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

31210122012 is a wasteful number, since it uses less digits than its factorization.

31210122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600843508 (or 2600843506 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31210122012 its reverse (21022101213), we get a palindrome (52232223225).

The spelling of 31210122012 in words is "thirty-one billion, two hundred ten million, one hundred twenty-two thousand, twelve".