21303110051 has 2 divisors, whose sum is σ = 21303110052. Its totient is φ = 21303110050.

The previous prime is 21303110041. The next prime is 21303110113. The reversal of 21303110051 is 15001130312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303110051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303110041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651555025 + 10651555026.

It is an arithmetic number, because the mean of its divisors is an integer number (10651555026).

Almost surely, 2^21303110051 is an apocalyptic number.

21303110051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303110051 is an equidigital number, since it uses as much as digits as its factorization.

21303110051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 21303110051 its reverse (15001130312), we get a palindrome (36304240363).

The spelling of 21303110051 in words is "twenty-one billion, three hundred three million, one hundred ten thousand, fifty-one".