21223330313 has 2 divisors, whose sum is σ = 21223330314. Its totient is φ = 21223330312.

The previous prime is 21223330309. The next prime is 21223330327. The reversal of 21223330313 is 31303332212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20893835209 + 329495104 = 144547^2 + 18152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223330313 - 2² = 21223330309 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223330363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611665156 + 10611665157.

It is an arithmetic number, because the mean of its divisors is an integer number (10611665157).

Almost surely, 2^21223330313 is an apocalyptic number.

It is an amenable number.

21223330313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223330313 is an equidigital number, since it uses as much as digits as its factorization.

21223330313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21223330313 its reverse (31303332212), we get a palindrome (52526662525).

The spelling of 21223330313 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty thousand, three hundred thirteen".