1921013100012 has 24 divisors (see below), whose sum is σ = 4558336171200. Its totient is φ = 629484518416.

The previous prime is 1921013100007. The next prime is 1921013100049. The reversal of 1921013100012 is 2100013101291.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356646962 + ... + 1356648377.

It is an arithmetic number, because the mean of its divisors is an integer number (189930673800).

Almost surely, 2^{1921013100012} is an apocalyptic number.

1921013100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1921013100012 is an abundant number, since it is smaller than the sum of its proper divisors (2637323071188).

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

1921013100012 is a wasteful number, since it uses less digits than its factorization.

1921013100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713295405 (or 2713295403 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

The spelling of 1921013100012 in words is "one trillion, nine hundred twenty-one billion, thirteen million, one hundred thousand, twelve".