312021210222 has 24 divisors (see below), whose sum is σ = 676161766800. Its totient is φ = 103989252960.

The previous prime is 312021210209. The next prime is 312021210257. The reversal of 312021210222 is 222012120213.

312021210222 is a `hidden beast` number, since 31 + 202 + 1 + 210 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 312021210195 and 312021210204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1376554 + ... + 1587117.

It is an arithmetic number, because the mean of its divisors is an integer number (28173406950).

Almost surely, 2^312021210222 is an apocalyptic number.

312021210222 is an abundant number, since it is smaller than the sum of its proper divisors (364140556578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312021210222 is a wasteful number, since it uses less digits than its factorization.

312021210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969528 (or 2969525 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 312021210222 its reverse (222012120213), we get a palindrome (534033330435).

Subtracting from 312021210222 its reverse (222012120213), we obtain a palindrome (90009090009).

The spelling of 312021210222 in words is "three hundred twelve billion, twenty-one million, two hundred ten thousand, two hundred twenty-two".