312021044304221 has 8 divisors (see below), whose sum is σ = 356595656776704. Its totient is φ = 267446476224720.

The previous prime is 312021044304191. The next prime is 312021044304269. The reversal of 312021044304221 is 122403440120213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312021044304221 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 (312021044304421) 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, 5647556 + ... + 25611266.

It is an arithmetic number, because the mean of its divisors is an integer number (44574457097088).

Almost surely, 2^{312021044304221} is an apocalyptic number.

It is an amenable number.

312021044304221 is a deficient number, since it is larger than the sum of its proper divisors (44574612472483).

312021044304221 is a wasteful number, since it uses less digits than its factorization.

312021044304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22196491.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 312021044304221 its reverse (122403440120213), we get a palindrome (434424484424434).

The spelling of 312021044304221 in words is "three hundred twelve trillion, twenty-one billion, forty-four million, three hundred four thousand, two hundred twenty-one".