21310232303 has 2 divisors, whose sum is σ = 21310232304. Its totient is φ = 21310232302.

The previous prime is 21310232269. The next prime is 21310232387. The reversal of 21310232303 is 30323201312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21310232303 - 2⁶ = 21310232239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21310232393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655116151 + 10655116152.

It is an arithmetic number, because the mean of its divisors is an integer number (10655116152).

Almost surely, 2^21310232303 is an apocalyptic number.

21310232303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310232303 is an equidigital number, since it uses as much as digits as its factorization.

21310232303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21310232303 its reverse (30323201312), we get a palindrome (51633433615).

The spelling of 21310232303 in words is "twenty-one billion, three hundred ten million, two hundred thirty-two thousand, three hundred three".