312213202112 has 28 divisors (see below), whose sum is σ = 708054941520. Its totient is φ = 133805657856.

The previous prime is 312213202097. The next prime is 312213202129. The reversal of 312213202112 is 211202312213.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×312213202112² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348451787 + ... + 348452682.

Almost surely, 2^312213202112 is an apocalyptic number.

312213202112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

312213202112 is an abundant number, since it is smaller than the sum of its proper divisors (395841739408).

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

312213202112 is an equidigital number, since it uses as much as digits as its factorization.

312213202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696904488 (or 696904478 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 312213202112 its reverse (211202312213), we get a palindrome (523415514325).

The spelling of 312213202112 in words is "three hundred twelve billion, two hundred thirteen million, two hundred two thousand, one hundred twelve".