21011012196 has 24 divisors (see below), whose sum is σ = 49028277984. Its totient is φ = 7003301760.

The previous prime is 21011012177. The next prime is 21011012273. The reversal of 21011012196 is 69121011012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287916 + ... + 353436.

It is an arithmetic number, because the mean of its divisors is an integer number (2042844916).

Almost surely, 2^21011012196 is an apocalyptic number.

It is an amenable number.

21011012196 is an abundant number, since it is smaller than the sum of its proper divisors (28017265788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011012196 is a wasteful number, since it uses less digits than its factorization.

21011012196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92251 (or 92249 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 24.

The spelling of 21011012196 in words is "twenty-one billion, eleven million, twelve thousand, one hundred ninety-six".