21113430323 has 2 divisors, whose sum is σ = 21113430324. Its totient is φ = 21113430322.

The previous prime is 21113430319. The next prime is 21113430413. The reversal of 21113430323 is 32303431112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113430323 - 2² = 21113430319 is a prime.

It is not a weakly prime, because it can be changed into another prime (21113430223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556715161 + 10556715162.

It is an arithmetic number, because the mean of its divisors is an integer number (10556715162).

Almost surely, 2^21113430323 is an apocalyptic number.

21113430323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113430323 is an equidigital number, since it uses as much as digits as its factorization.

21113430323 is an evil number, because the sum of its binary digits is even.

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

Adding to 21113430323 its reverse (32303431112), we get a palindrome (53416861435).

The spelling of 21113430323 in words is "twenty-one billion, one hundred thirteen million, four hundred thirty thousand, three hundred twenty-three".