23131303303421 has 2 divisors, whose sum is σ = 23131303303422. Its totient is φ = 23131303303420.

The previous prime is 23131303303379. The next prime is 23131303303441. The reversal of 23131303303421 is 12430330313132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22398591271225 + 732712032196 = 4732715^2 + 855986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131303303421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23131303303441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565651651710 + 11565651651711.

It is an arithmetic number, because the mean of its divisors is an integer number (11565651651711).

Almost surely, 2^{23131303303421} is an apocalyptic number.

It is an amenable number.

23131303303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131303303421 is an equidigital number, since it uses as much as digits as its factorization.

23131303303421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 23131303303421 its reverse (12430330313132), we get a palindrome (35561633616553).

The spelling of 23131303303421 in words is "twenty-three trillion, one hundred thirty-one billion, three hundred three million, three hundred three thousand, four hundred twenty-one".