21132010423 has 2 divisors, whose sum is σ = 21132010424. Its totient is φ = 21132010422.

The previous prime is 21132010399. The next prime is 21132010433. The reversal of 21132010423 is 32401023112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21132010423 - 2³³ = 12542075831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21132010423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132010433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566005211 + 10566005212.

It is an arithmetic number, because the mean of its divisors is an integer number (10566005212).

Almost surely, 2^21132010423 is an apocalyptic number.

21132010423 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132010423 is an equidigital number, since it uses as much as digits as its factorization.

21132010423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21132010423 its reverse (32401023112), we get a palindrome (53533033535).

The spelling of 21132010423 in words is "twenty-one billion, one hundred thirty-two million, ten thousand, four hundred twenty-three".