312221230112 has 48 divisors (see below), whose sum is σ = 684833450112. Its totient is φ = 138899185920.

The previous prime is 312221230109. The next prime is 312221230151. The reversal of 312221230112 is 211032122213.

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, 9419543 + ... + 9452630.

It is an arithmetic number, because the mean of its divisors is an integer number (14267363544).

Almost surely, 2^312221230112 is an apocalyptic number.

312221230112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

312221230112 is an abundant number, since it is smaller than the sum of its proper divisors (372612220000).

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

312221230112 is a wasteful number, since it uses less digits than its factorization.

312221230112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18872241 (or 18872233 counting only the distinct ones).

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

Adding to 312221230112 its reverse (211032122213), we get a palindrome (523253352325).

The spelling of 312221230112 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred thirty thousand, one hundred twelve".