21101313323 has 2 divisors, whose sum is σ = 21101313324. Its totient is φ = 21101313322.

The previous prime is 21101313319. The next prime is 21101313349. The reversal of 21101313323 is 32331310112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101313323 - 2² = 21101313319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101313295 and 21101313304.

It is not a weakly prime, because it can be changed into another prime (21101313313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550656661 + 10550656662.

It is an arithmetic number, because the mean of its divisors is an integer number (10550656662).

Almost surely, 2^21101313323 is an apocalyptic number.

21101313323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101313323 is an equidigital number, since it uses as much as digits as its factorization.

21101313323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21101313323 its reverse (32331310112), we get a palindrome (53432623435).

The spelling of 21101313323 in words is "twenty-one billion, one hundred one million, three hundred thirteen thousand, three hundred twenty-three".