21113343313 has 16 divisors (see below), whose sum is σ = 21960481536. Its totient is φ = 20282952960.

The previous prime is 21113343289. The next prime is 21113343437. The reversal of 21113343313 is 31334331112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113343313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113343113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1931020 + ... + 1941922.

It is an arithmetic number, because the mean of its divisors is an integer number (1372530096).

Almost surely, 2^21113343313 is an apocalyptic number.

It is an amenable number.

21113343313 is a deficient number, since it is larger than the sum of its proper divisors (847138223).

21113343313 is a wasteful number, since it uses less digits than its factorization.

21113343313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11664.

The product of its digits is 1944, while the sum is 25.

Adding to 21113343313 its reverse (31334331112), we get a palindrome (52447674425).

The spelling of 21113343313 in words is "twenty-one billion, one hundred thirteen million, three hundred forty-three thousand, three hundred thirteen".