21313132223 has 2 divisors, whose sum is σ = 21313132224. Its totient is φ = 21313132222.

The previous prime is 21313132201. The next prime is 21313132259. The reversal of 21313132223 is 32223131312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313132223 - 2¹⁴ = 21313115839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313132123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656566111 + 10656566112.

It is an arithmetic number, because the mean of its divisors is an integer number (10656566112).

Almost surely, 2^21313132223 is an apocalyptic number.

21313132223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313132223 is an equidigital number, since it uses as much as digits as its factorization.

21313132223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

Adding to 21313132223 its reverse (32223131312), we get a palindrome (53536263535).

The spelling of 21313132223 in words is "twenty-one billion, three hundred thirteen million, one hundred thirty-two thousand, two hundred twenty-three".