21022312303 has 2 divisors, whose sum is σ = 21022312304. Its totient is φ = 21022312302.

The previous prime is 21022312247. The next prime is 21022312343. The reversal of 21022312303 is 30321322012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022312303 - 2²⁵ = 20988757871 is a prime.

It is a super-2 number, since 2×21022312303² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022312343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511156151 + 10511156152.

It is an arithmetic number, because the mean of its divisors is an integer number (10511156152).

Almost surely, 2^21022312303 is an apocalyptic number.

21022312303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022312303 is an equidigital number, since it uses as much as digits as its factorization.

21022312303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21022312303 its reverse (30321322012), we get a palindrome (51343634315).

The spelling of 21022312303 in words is "twenty-one billion, twenty-two million, three hundred twelve thousand, three hundred three".