21011202196 has 12 divisors (see below), whose sum is σ = 37955720320. Its totient is φ = 10166710680.

The previous prime is 21011202161. The next prime is 21011202209. The reversal of 21011202196 is 69120211012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21011202196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84722466 + ... + 84722713.

Almost surely, 2^21011202196 is an apocalyptic number.

It is an amenable number.

21011202196 is a deficient number, since it is larger than the sum of its proper divisors (16944518124).

21011202196 is a wasteful number, since it uses less digits than its factorization.

21011202196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169445214 (or 169445212 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 21011202196 in words is "twenty-one billion, eleven million, two hundred two thousand, one hundred ninety-six".