131212100312 has 16 divisors (see below), whose sum is σ = 247258986000. Its totient is φ = 65276370720.

The previous prime is 131212100293. The next prime is 131212100329. The reversal of 131212100312 is 213001212131.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 41208239 + ... + 41211422.

It is an arithmetic number, because the mean of its divisors is an integer number (15453686625).

Almost surely, 2^131212100312 is an apocalyptic number.

It is an amenable number.

131212100312 is a deficient number, since it is larger than the sum of its proper divisors (116046885688).

131212100312 is a wasteful number, since it uses less digits than its factorization.

131212100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82419866 (or 82419862 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131212100312 its reverse (213001212131), we get a palindrome (344213312443).

The spelling of 131212100312 in words is "one hundred thirty-one billion, two hundred twelve million, one hundred thousand, three hundred twelve".