312220030221 has 64 divisors (see below), whose sum is σ = 517694976000. Its totient is φ = 184369731840.

The previous prime is 312220030139. The next prime is 312220030247. The reversal of 312220030221 is 122030022213.

It is not a de Polignac number, because 312220030221 - 2⁷ = 312220030093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312220030194 and 312220030203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220030121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1901260 + ... + 2058938.

It is an arithmetic number, because the mean of its divisors is an integer number (8088984000).

Almost surely, 2^312220030221 is an apocalyptic number.

It is an amenable number.

312220030221 is a deficient number, since it is larger than the sum of its proper divisors (205474945779).

312220030221 is a wasteful number, since it uses less digits than its factorization.

312220030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157871 (or 157865 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 312220030221 its reverse (122030022213), we get a palindrome (434250052434).

The spelling of 312220030221 in words is "three hundred twelve billion, two hundred twenty million, thirty thousand, two hundred twenty-one".