131212013021340 has 48 divisors (see below), whose sum is σ = 368006981529600. Its totient is φ = 34931456322880.

The previous prime is 131212013021291. The next prime is 131212013021399. The reversal of 131212013021340 is 43120310212131.

It is a super-2 number, since 2×131212013021340² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131212013021340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1825395516 + ... + 1825467395.

It is an arithmetic number, because the mean of its divisors is an integer number (7666812115200).

Almost surely, 2^{131212013021340} is an apocalyptic number.

131212013021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131212013021340 is an abundant number, since it is smaller than the sum of its proper divisors (236794968508260).

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

131212013021340 is a wasteful number, since it uses less digits than its factorization.

131212013021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650863522 (or 3650863520 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 131212013021340 its reverse (43120310212131), we get a palindrome (174332323233471).

The spelling of 131212013021340 in words is "one hundred thirty-one trillion, two hundred twelve billion, thirteen million, twenty-one thousand, three hundred forty".