21003122196 has 72 divisors (see below), whose sum is σ = 63869158080. Its totient is φ = 5685054336.

The previous prime is 21003122183. The next prime is 21003122213. The reversal of 21003122196 is 69122130012.

It is a super-2 number, since 2×21003122196² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2188521 + ... + 2198096.

It is an arithmetic number, because the mean of its divisors is an integer number (887071640).

Almost surely, 2^21003122196 is an apocalyptic number.

It is an amenable number.

21003122196 is an abundant number, since it is smaller than the sum of its proper divisors (42866035884).

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

21003122196 is a wasteful number, since it uses less digits than its factorization.

21003122196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386653 (or 4386648 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 21003122196 in words is "twenty-one billion, three million, one hundred twenty-two thousand, one hundred ninety-six".