1002120109979 has 4 divisors (see below), whose sum is σ = 1002137599584. Its totient is φ = 1002102620376.

The previous prime is 1002120109973. The next prime is 1002120109981. The reversal of 1002120109979 is 9799010212001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002120109979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002120109973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658572 + ... + 8773545.

It is an arithmetic number, because the mean of its divisors is an integer number (250534399896).

Almost surely, 2^{1002120109979} is an apocalyptic number.

1002120109979 is a deficient number, since it is larger than the sum of its proper divisors (17489605).

1002120109979 is an equidigital number, since it uses as much as digits as its factorization.

1002120109979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17489604.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 1002120109979 in words is "one trillion, two billion, one hundred twenty million, one hundred nine thousand, nine hundred seventy-nine".