1998007531212 has 96 divisors (see below), whose sum is σ = 5812650192384. Its totient is φ = 518939366400.

The previous prime is 1998007531199. The next prime is 1998007531229. The reversal of 1998007531212 is 2121357008991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30526762 + ... + 30592142.

It is an arithmetic number, because the mean of its divisors is an integer number (60548439504).

Almost surely, 2^{1998007531212} is an apocalyptic number.

1998007531212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1998007531212 is an abundant number, since it is smaller than the sum of its proper divisors (3814642661172).

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

1998007531212 is a wasteful number, since it uses less digits than its factorization.

1998007531212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98479 (or 98477 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 1998007531212 in words is "one trillion, nine hundred ninety-eight billion, seven million, five hundred thirty-one thousand, two hundred twelve".