21000002002197 has 32 divisors (see below), whose sum is σ = 28956630374400. Its totient is φ = 13526990668800.

The previous prime is 21000002002181. The next prime is 21000002002201. The reversal of 21000002002197 is 79120020000012.

It is not a de Polignac number, because 21000002002197 - 2⁴ = 21000002002181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000002702197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70522572 + ... + 70819722.

It is an arithmetic number, because the mean of its divisors is an integer number (904894699200).

Almost surely, 2^{21000002002197} is an apocalyptic number.

It is an amenable number.

21000002002197 is a deficient number, since it is larger than the sum of its proper divisors (7956628372203).

21000002002197 is a wasteful number, since it uses less digits than its factorization.

21000002002197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301613.

The product of its (nonzero) digits is 504, while the sum is 24.

The spelling of 21000002002197 in words is "twenty-one trillion, two million, two thousand, one hundred ninety-seven".