21972911133 has 32 divisors (see below), whose sum is σ = 31250044800. Its totient is φ = 13693833216.

The previous prime is 21972911117. The next prime is 21972911141. The reversal of 21972911133 is 33111927912.

It is not a de Polignac number, because 21972911133 - 2⁴ = 21972911117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21972911091 and 21972911100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21972911633) 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, 1467541 + ... + 1482437.

It is an arithmetic number, because the mean of its divisors is an integer number (976563900).

Almost surely, 2^21972911133 is an apocalyptic number.

It is an amenable number.

21972911133 is a deficient number, since it is larger than the sum of its proper divisors (9277133667).

21972911133 is a wasteful number, since it uses less digits than its factorization.

21972911133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15261.

The product of its digits is 20412, while the sum is 39.

The spelling of 21972911133 in words is "twenty-one billion, nine hundred seventy-two million, nine hundred eleven thousand, one hundred thirty-three".