31230012102 has 32 divisors (see below), whose sum is σ = 62854816992. Its totient is φ = 10344409344.

The previous prime is 31230012049. The next prime is 31230012113. The reversal of 31230012102 is 20121003213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594738 + ... + 645114.

It is an arithmetic number, because the mean of its divisors is an integer number (1964213031).

Almost surely, 2^31230012102 is an apocalyptic number.

31230012102 is an abundant number, since it is smaller than the sum of its proper divisors (31624804890).

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

31230012102 is a wasteful number, since it uses less digits than its factorization.

31230012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51032.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31230012102 its reverse (20121003213), we get a palindrome (51351015315).

The spelling of 31230012102 in words is "thirty-one billion, two hundred thirty million, twelve thousand, one hundred two".