21231102322197 has 6 divisors (see below), whose sum is σ = 30667147798742. Its totient is φ = 14154068214792.

The previous prime is 21231102322121. The next prime is 21231102322259. The reversal of 21231102322197 is 79122320113212.

21231102322197 is a `hidden beast` number, since 2 + 1 + 2 + 311 + 0 + 2 + 322 + 19 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20837755095921 + 393347226276 = 4564839^2 + 627174^2 .

It is not a de Polignac number, because 21231102322197 - 2⁷ = 21231102322069 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 (21231102322697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179505684558 + ... + 1179505684575.

Almost surely, 2^{21231102322197} is an apocalyptic number.

It is an amenable number.

21231102322197 is a deficient number, since it is larger than the sum of its proper divisors (9436045476545).

21231102322197 is a wasteful number, since it uses less digits than its factorization.

21231102322197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359011369139 (or 2359011369136 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 21231102322197 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred two million, three hundred twenty-two thousand, one hundred ninety-seven".