312142133000021 has 4 divisors (see below), whose sum is σ = 317432677627200. Its totient is φ = 306851588372844.

The previous prime is 312142132999951. The next prime is 312142133000063. The reversal of 312142133000021 is 120000331241213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312142133000021 is a prime.

It is a super-2 number, since 2×312142133000021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312142153000021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2645272313501 + ... + 2645272313618.

It is an arithmetic number, because the mean of its divisors is an integer number (79358169406800).

Almost surely, 2^{312142133000021} is an apocalyptic number.

It is an amenable number.

312142133000021 is a deficient number, since it is larger than the sum of its proper divisors (5290544627179).

312142133000021 is an equidigital number, since it uses as much as digits as its factorization.

312142133000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290544627178.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 312142133000021 its reverse (120000331241213), we get a palindrome (432142464241234).

The spelling of 312142133000021 in words is "three hundred twelve trillion, one hundred forty-two billion, one hundred thirty-three million, twenty-one", and thus it is an aban number.