21132210223 has 2 divisors, whose sum is σ = 21132210224. Its totient is φ = 21132210222.

The previous prime is 21132210193. The next prime is 21132210257. The reversal of 21132210223 is 32201223112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132210223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21132210223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132214223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566105111 + 10566105112.

It is an arithmetic number, because the mean of its divisors is an integer number (10566105112).

Almost surely, 2^21132210223 is an apocalyptic number.

21132210223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132210223 is an equidigital number, since it uses as much as digits as its factorization.

21132210223 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 21132210223 its reverse (32201223112), we get a palindrome (53333433335).

The spelling of 21132210223 in words is "twenty-one billion, one hundred thirty-two million, two hundred ten thousand, two hundred twenty-three".