991202022210201 has 16 divisors (see below), whose sum is σ = 1321743184708800. Its totient is φ = 660731106889728.

The previous prime is 991202022210167. The next prime is 991202022210227. The reversal of 991202022210201 is 102012220202199.

It is not a de Polignac number, because 991202022210201 - 2³⁰ = 991200948468377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (991202022210601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434480345 + ... + 1435171161.

It is an arithmetic number, because the mean of its divisors is an integer number (82608949044300).

Almost surely, 2^{991202022210201} is an apocalyptic number.

It is an amenable number.

991202022210201 is a deficient number, since it is larger than the sum of its proper divisors (330541162498599).

991202022210201 is a wasteful number, since it uses less digits than its factorization.

991202022210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740968.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 991202022210201 in words is "nine hundred ninety-one trillion, two hundred two billion, twenty-two million, two hundred ten thousand, two hundred one".