312404020621 has 8 divisors (see below), whose sum is σ = 389490727104. Its totient is φ = 243431704320.

The previous prime is 312404020553. The next prime is 312404020627. The reversal of 312404020621 is 126020404213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312404020621 - 2²⁵ = 312370466189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312404020627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028597460 + ... + 2028597613.

It is an arithmetic number, because the mean of its divisors is an integer number (48686340888).

Almost surely, 2^312404020621 is an apocalyptic number.

It is an amenable number.

312404020621 is a deficient number, since it is larger than the sum of its proper divisors (77086706483).

312404020621 is a wasteful number, since it uses less digits than its factorization.

312404020621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057195091.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 312404020621 its reverse (126020404213), we get a palindrome (438424424834).

The spelling of 312404020621 in words is "three hundred twelve billion, four hundred four million, twenty thousand, six hundred twenty-one".