312120222 has 16 divisors (see below), whose sum is σ = 626251392. Its totient is φ = 103704920.

The previous prime is 312120217. The next prime is 312120229. The reversal of 312120222 is 222021213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120229) 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, 81768 + ... + 85499.

It is an arithmetic number, because the mean of its divisors is an integer number (39140712).

Almost surely, 2^312120222 is an apocalyptic number.

312120222 is an abundant number, since it is smaller than the sum of its proper divisors (314131170).

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

312120222 is a wasteful number, since it uses less digits than its factorization.

312120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167583.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 312120222 is about 17666.9245201308. The cubic root of 312120222 is about 678.3293924207.

Adding to 312120222 its reverse (222021213), we get a palindrome (534141435).

Subtracting from 312120222 its reverse (222021213), we obtain a palindrome (90099009).

The spelling of 312120222 in words is "three hundred twelve million, one hundred twenty thousand, two hundred twenty-two".