31212102122130 has 128 divisors (see below), whose sum is σ = 76562309376000. Its totient is φ = 8140531636224.

The previous prime is 31212102122129. The next prime is 31212102122231. The reversal of 31212102122130 is 3122120121213.

It is a junction number, because it is equal to n+sod(n) for n = 31212102122097 and 31212102122106.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 3156878047 + ... + 3156887933.

It is an arithmetic number, because the mean of its divisors is an integer number (598143042000).

Almost surely, 2^{31212102122130} is an apocalyptic number.

31212102122130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212102122130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38281154688000).

31212102122130 is an abundant number, since it is smaller than the sum of its proper divisors (45350207253870).

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

31212102122130 is a wasteful number, since it uses less digits than its factorization.

31212102122130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15988.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31212102122130 its reverse (3122120121213), we get a palindrome (34334222243343).

The spelling of 31212102122130 in words is "thirty-one trillion, two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, one hundred thirty".