21132622123 has 4 divisors (see below), whose sum is σ = 22375717560. Its totient is φ = 19889526688.

The previous prime is 21132622109. The next prime is 21132622127. The reversal of 21132622123 is 32122623112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132622123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21132622127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621547693 + ... + 621547726.

It is an arithmetic number, because the mean of its divisors is an integer number (5593929390).

Almost surely, 2^21132622123 is an apocalyptic number.

21132622123 is a deficient number, since it is larger than the sum of its proper divisors (1243095437).

21132622123 is a wasteful number, since it uses less digits than its factorization.

21132622123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243095436.

The product of its digits is 1728, while the sum is 25.

The spelling of 21132622123 in words is "twenty-one billion, one hundred thirty-two million, six hundred twenty-two thousand, one hundred twenty-three".