1990112112012 has 12 divisors (see below), whose sum is σ = 4643594928056. Its totient is φ = 663370704000.

The previous prime is 1990112112007. The next prime is 1990112112031. The reversal of 1990112112012 is 2102112110991.

It is a tau number, because it is divible by the number of its divisors (12).

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, 82921337989 + ... + 82921338012.

Almost surely, 2^{1990112112012} is an apocalyptic number.

1990112112012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1990112112012 is an abundant number, since it is smaller than the sum of its proper divisors (2653482816044).

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

1990112112012 is a wasteful number, since it uses less digits than its factorization.

1990112112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165842676008 (or 165842676006 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 1990112112012 in words is "one trillion, nine hundred ninety billion, one hundred twelve million, one hundred twelve thousand, twelve".