891022111000002 has 16 divisors (see below), whose sum is σ = 1980049135555680. Its totient is φ = 297007370333316.

The previous prime is 891022110999991. The next prime is 891022111000013. The reversal of 891022111000002 is 200000111220198.

It is an interprime number because it is at equal distance from previous prime (891022110999991) and next prime (891022111000013).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 891022111000002.

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, 8250204731428 + ... + 8250204731535.

It is an arithmetic number, because the mean of its divisors is an integer number (123753070972230).

Almost surely, 2^{891022111000002} is an apocalyptic number.

891022111000002 is an abundant number, since it is smaller than the sum of its proper divisors (1089027024555678).

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

891022111000002 is a wasteful number, since it uses less digits than its factorization.

891022111000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16500409462974 (or 16500409462968 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The spelling of 891022111000002 in words is "eight hundred ninety-one trillion, twenty-two billion, one hundred eleven million, two", and thus it is an aban number.