312121203112 has 64 divisors (see below), whose sum is σ = 598668744960. Its totient is φ = 152501356800.

The previous prime is 312121203083. The next prime is 312121203131. The reversal of 312121203112 is 211302121213.

It is a self number, because there is not a number n which added to its sum of digits gives 312121203112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130977073 + ... + 130979455.

It is an arithmetic number, because the mean of its divisors is an integer number (9354199140).

Almost surely, 2^312121203112 is an apocalyptic number.

It is an amenable number.

312121203112 is a deficient number, since it is larger than the sum of its proper divisors (286547541848).

312121203112 is a wasteful number, since it uses less digits than its factorization.

312121203112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554 (or 3550 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312121203112 its reverse (211302121213), we get a palindrome (523423324325).

The spelling of 312121203112 in words is "three hundred twelve billion, one hundred twenty-one million, two hundred three thousand, one hundred twelve".