31020002100312 has 32 divisors (see below), whose sum is σ = 78484342668480. Its totient is φ = 10215422377760.

The previous prime is 31020002100221. The next prime is 31020002100319. The reversal of 31020002100312 is 21300120002013.

It is a junction number, because it is equal to n+sod(n) for n = 31020002100291 and 31020002100300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020002100319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7786143114 + ... + 7786147097.

It is an arithmetic number, because the mean of its divisors is an integer number (2452635708390).

Almost surely, 2^{31020002100312} is an apocalyptic number.

It is an amenable number.

31020002100312 is an abundant number, since it is smaller than the sum of its proper divisors (47464340568168).

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

31020002100312 is a wasteful number, since it uses less digits than its factorization.

31020002100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15572290303 (or 15572290299 counting only the distinct ones).

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

Adding to 31020002100312 its reverse (21300120002013), we get a palindrome (52320122102325).

The spelling of 31020002100312 in words is "thirty-one trillion, twenty billion, two million, one hundred thousand, three hundred twelve".