312421544021 has 4 divisors (see below), whose sum is σ = 328864783200. Its totient is φ = 295978304844.

The previous prime is 312421543997. The next prime is 312421544047. The reversal of 312421544021 is 120445124213.

It is a happy number.

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 not a de Polignac number, because 312421544021 - 2³⁴ = 295241674837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312421540021) by changing a digit.

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, 8221619561 + ... + 8221619598.

It is an arithmetic number, because the mean of its divisors is an integer number (82216195800).

Almost surely, 2^312421544021 is an apocalyptic number.

It is an amenable number.

312421544021 is a deficient number, since it is larger than the sum of its proper divisors (16443239179).

312421544021 is a wasteful number, since it uses less digits than its factorization.

312421544021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16443239178.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 312421544021 its reverse (120445124213), we get a palindrome (432866668234).

The spelling of 312421544021 in words is "three hundred twelve billion, four hundred twenty-one million, five hundred forty-four thousand, twenty-one".