21201300313 has 2 divisors, whose sum is σ = 21201300314. Its totient is φ = 21201300312.

The previous prime is 21201300293. The next prime is 21201300349. The reversal of 21201300313 is 31300310212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19191392089 + 2009908224 = 138533^2 + 44832^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201300313 - 2²⁵ = 21167745881 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201300383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600650156 + 10600650157.

It is an arithmetic number, because the mean of its divisors is an integer number (10600650157).

Almost surely, 2^21201300313 is an apocalyptic number.

It is an amenable number.

21201300313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201300313 is an equidigital number, since it uses as much as digits as its factorization.

21201300313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21201300313 its reverse (31300310212), we get a palindrome (52501610525).

The spelling of 21201300313 in words is "twenty-one billion, two hundred one million, three hundred thousand, three hundred thirteen".