21132232291 has 2 divisors, whose sum is σ = 21132232292. Its totient is φ = 21132232290.

The previous prime is 21132232283. The next prime is 21132232301. The reversal of 21132232291 is 19223223112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21132232291 - 2³ = 21132232283 is a prime.

It is not a weakly prime, because it can be changed into another prime (21132232201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566116145 + 10566116146.

It is an arithmetic number, because the mean of its divisors is an integer number (10566116146).

Almost surely, 2^21132232291 is an apocalyptic number.

21132232291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132232291 is an equidigital number, since it uses as much as digits as its factorization.

21132232291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The spelling of 21132232291 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirty-two thousand, two hundred ninety-one".