1001992198120 has 64 divisors (see below), whose sum is σ = 2376646012800. Its totient is φ = 379141251840.

The previous prime is 1001992198111. The next prime is 1001992198147. The reversal of 1001992198120 is 218912991001.

It is a happy number.

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, 459196 + ... + 1488235.

It is an arithmetic number, because the mean of its divisors is an integer number (37135093950).

Almost surely, 2^{1001992198120} is an apocalyptic number.

1001992198120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001992198120 is an abundant number, since it is smaller than the sum of its proper divisors (1374653814680).

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

1001992198120 is a wasteful number, since it uses less digits than its factorization.

1001992198120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948138 (or 1948134 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 1001992198120 in words is "one trillion, one billion, nine hundred ninety-two million, one hundred ninety-eight thousand, one hundred twenty".