21013413313 has 2 divisors, whose sum is σ = 21013413314. Its totient is φ = 21013413312.

The previous prime is 21013413307. The next prime is 21013413401. The reversal of 21013413313 is 31331431012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19224377104 + 1789036209 = 138652^2 + 42297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21013413313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21013413713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506706656 + 10506706657.

It is an arithmetic number, because the mean of its divisors is an integer number (10506706657).

Almost surely, 2^21013413313 is an apocalyptic number.

It is an amenable number.

21013413313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013413313 is an equidigital number, since it uses as much as digits as its factorization.

21013413313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21013413313 its reverse (31331431012), we get a palindrome (52344844325).

The spelling of 21013413313 in words is "twenty-one billion, thirteen million, four hundred thirteen thousand, three hundred thirteen".