312220312221 has 8 divisors (see below), whose sum is σ = 418035565440. Its totient is φ = 207275966912.

The previous prime is 312220312219. The next prime is 312220312231. The reversal of 312220312221 is 122213022213.

312220312221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 312220312221 - 2¹ = 312220312219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220312231) 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, 217726140 + ... + 217727573.

It is an arithmetic number, because the mean of its divisors is an integer number (52254445680).

Almost surely, 2^312220312221 is an apocalyptic number.

It is an amenable number.

312220312221 is a deficient number, since it is larger than the sum of its proper divisors (105815253219).

312220312221 is a wasteful number, since it uses less digits than its factorization.

312220312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435453955.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 312220312221 its reverse (122213022213), we get a palindrome (434433334434).

The spelling of 312220312221 in words is "three hundred twelve billion, two hundred twenty million, three hundred twelve thousand, two hundred twenty-one".