312221120212 has 24 divisors (see below), whose sum is σ = 560568932000. Its totient is φ = 152077728096.

The previous prime is 312221120117. The next prime is 312221120221. The reversal of 312221120212 is 212021122213.

It is a self number, because there is not a number n which added to its sum of digits gives 312221120212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2329587 + ... + 2459962.

Almost surely, 2^312221120212 is an apocalyptic number.

It is an amenable number.

312221120212 is a deficient number, since it is larger than the sum of its proper divisors (248347811788).

312221120212 is a wasteful number, since it uses less digits than its factorization.

312221120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789975 (or 4789973 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 312221120212 its reverse (212021122213), we get a palindrome (524242242425).

The spelling of 312221120212 in words is "three hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twelve".