21132322243 has 16 divisors (see below), whose sum is σ = 23154072480. Its totient is φ = 19197513216.

The previous prime is 21132322229. The next prime is 21132322259. The reversal of 21132322243 is 34222323112.

It is a cyclic number.

It is not a de Polignac number, because 21132322243 - 2²¹ = 21130225091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132322543) 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 15 ways as a sum of consecutive naturals, for example, 2916421 + ... + 2923657.

It is an arithmetic number, because the mean of its divisors is an integer number (1447129530).

Almost surely, 2^21132322243 is an apocalyptic number.

21132322243 is a deficient number, since it is larger than the sum of its proper divisors (2021750237).

21132322243 is a wasteful number, since it uses less digits than its factorization.

21132322243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13206.

The product of its digits is 3456, while the sum is 25.

Adding to 21132322243 its reverse (34222323112), we get a palindrome (55354645355).

The spelling of 21132322243 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-two thousand, two hundred forty-three".