21211020102313 has 2 divisors, whose sum is σ = 21211020102314. Its totient is φ = 21211020102312.

The previous prime is 21211020102211. The next prime is 21211020102341. The reversal of 21211020102313 is 31320102011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19181272807449 + 2029747294864 = 4379643^2 + 1424692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211020102313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211020102353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605510051156 + 10605510051157.

It is an arithmetic number, because the mean of its divisors is an integer number (10605510051157).

Almost surely, 2^{21211020102313} is an apocalyptic number.

It is an amenable number.

21211020102313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211020102313 is an equidigital number, since it uses as much as digits as its factorization.

21211020102313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21211020102313 its reverse (31320102011212), we get a palindrome (52531122113525).

The spelling of 21211020102313 in words is "twenty-one trillion, two hundred eleven billion, twenty million, one hundred two thousand, three hundred thirteen".