189497221101 has 12 divisors (see below), whose sum is σ = 274387451260. Its totient is φ = 126022599360.

The previous prime is 189497221091. The next prime is 189497221181. The reversal of 189497221101 is 101122794981.

It can be written as a sum of positive squares in 2 ways, for example, as 114545018025 + 74952203076 = 338445^2 + 273774^2 .

It is not a de Polignac number, because 189497221101 - 2⁶ = 189497221037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189497221181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25736230 + ... + 25743591.

Almost surely, 2^189497221101 is an apocalyptic number.

It is an amenable number.

189497221101 is a deficient number, since it is larger than the sum of its proper divisors (84890230159).

189497221101 is a wasteful number, since it uses less digits than its factorization.

189497221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51480236 (or 51480233 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The spelling of 189497221101 in words is "one hundred eighty-nine billion, four hundred ninety-seven million, two hundred twenty-one thousand, one hundred one".