131212001320421 has 16 divisors (see below), whose sum is σ = 156482666102784. Its totient is φ = 107573249965104.

The previous prime is 131212001320369. The next prime is 131212001320447. The reversal of 131212001320421 is 124023100212131.

It is not a de Polignac number, because 131212001320421 - 2⁶ = 131212001320357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212001020421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12204095 + ... + 20282108.

It is an arithmetic number, because the mean of its divisors is an integer number (9780166631424).

Almost surely, 2^{131212001320421} is an apocalyptic number.

It is an amenable number.

131212001320421 is a deficient number, since it is larger than the sum of its proper divisors (25270664782363).

131212001320421 is a wasteful number, since it uses less digits than its factorization.

131212001320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32511320.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 131212001320421 its reverse (124023100212131), we get a palindrome (255235101532552).

The spelling of 131212001320421 in words is "one hundred thirty-one trillion, two hundred twelve billion, one million, three hundred twenty thousand, four hundred twenty-one".