312132131223400 has 24 divisors (see below), whose sum is σ = 725707205094870. Its totient is φ = 124852852489280.

The previous prime is 312132131223397. The next prime is 312132131223401. The reversal of 312132131223400 is 4322131231213.

It can be written as a sum of positive squares in 3 ways, for example, as 228576480612516 + 83555650610884 = 15118746^2 + 9140878^2 .

It is not an unprimeable number, because it can be changed into a prime (312132131223401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 780330327859 + ... + 780330328258.

Almost surely, 2^{312132131223400} is an apocalyptic number.

It is an amenable number.

312132131223400 is an abundant number, since it is smaller than the sum of its proper divisors (413575073871470).

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

312132131223400 is a wasteful number, since it uses less digits than its factorization.

312132131223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560660656133 (or 1560660656124 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 312132131223400 its reverse (4322131231213), we get a palindrome (316454262454613).

The spelling of 312132131223400 in words is "three hundred twelve trillion, one hundred thirty-two billion, one hundred thirty-one million, two hundred twenty-three thousand, four hundred".