312121111996 has 6 divisors (see below), whose sum is σ = 546211946000. Its totient is φ = 156060555996.

The previous prime is 312121111949. The next prime is 312121111997. The reversal of 312121111996 is 699111121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121111997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39015138996 + ... + 39015139003.

Almost surely, 2^312121111996 is an apocalyptic number.

It is an amenable number.

312121111996 is a deficient number, since it is larger than the sum of its proper divisors (234090834004).

312121111996 is a wasteful number, since it uses less digits than its factorization.

312121111996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78030278003 (or 78030278001 counting only the distinct ones).

The product of its digits is 5832, while the sum is 37.

The spelling of 312121111996 in words is "three hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred ninety-six".