811002120002 has 32 divisors (see below), whose sum is σ = 1225166746752. Its totient is φ = 402624964224.

The previous prime is 811002119959. The next prime is 811002120011. The reversal of 811002120002 is 200021200118.

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, 317168108 + ... + 317170664.

It is an arithmetic number, because the mean of its divisors is an integer number (38286460836).

Almost surely, 2^811002120002 is an apocalyptic number.

811002120002 is a deficient number, since it is larger than the sum of its proper divisors (414164626750).

811002120002 is a wasteful number, since it uses less digits than its factorization.

811002120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442.

The product of its (nonzero) digits is 64, while the sum is 17.

The spelling of 811002120002 in words is "eight hundred eleven billion, two million, one hundred twenty thousand, two".