21132213023 has 2 divisors, whose sum is σ = 21132213024. Its totient is φ = 21132213022.

The previous prime is 21132213007. The next prime is 21132213043. The reversal of 21132213023 is 32031223112.

It is an a-pointer prime, because the next prime (21132213043) can be obtained adding 21132213023 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21132213023 - 2⁴ = 21132213007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21132212986 and 21132213004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132213043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566106511 + 10566106512.

It is an arithmetic number, because the mean of its divisors is an integer number (10566106512).

Almost surely, 2^21132213023 is an apocalyptic number.

21132213023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132213023 is an equidigital number, since it uses as much as digits as its factorization.

21132213023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21132213023 its reverse (32031223112), we get a palindrome (53163436135).

The spelling of 21132213023 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirteen thousand, twenty-three".