21928272201 has 24 divisors (see below), whose sum is σ = 35288832384. Its totient is φ = 13007096160.

The previous prime is 21928272169. The next prime is 21928272257. The reversal of 21928272201 is 10227282912.

It is not a de Polignac number, because 21928272201 - 2⁵ = 21928272169 is a prime.

It is a super-2 number, since 2×21928272201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21928272281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2351706 + ... + 2361011.

It is an arithmetic number, because the mean of its divisors is an integer number (1470368016).

Almost surely, 2^21928272201 is an apocalyptic number.

It is an amenable number.

21928272201 is a deficient number, since it is larger than the sum of its proper divisors (13360560183).

21928272201 is a wasteful number, since it uses less digits than its factorization.

21928272201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4712781 (or 4712778 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 21928272201 in words is "twenty-one billion, nine hundred twenty-eight million, two hundred seventy-two thousand, two hundred one".