21021300213301 has 2 divisors, whose sum is σ = 21021300213302. Its totient is φ = 21021300213300.

The previous prime is 21021300213289. The next prime is 21021300213317. The reversal of 21021300213301 is 10331200312012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18340791238225 + 2680508975076 = 4282615^2 + 1637226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021300213301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021300213101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510650106650 + 10510650106651.

It is an arithmetic number, because the mean of its divisors is an integer number (10510650106651).

Almost surely, 2^{21021300213301} is an apocalyptic number.

It is an amenable number.

21021300213301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021300213301 is an equidigital number, since it uses as much as digits as its factorization.

21021300213301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21021300213301 its reverse (10331200312012), we get a palindrome (31352500525313).

The spelling of 21021300213301 in words is "twenty-one trillion, twenty-one billion, three hundred million, two hundred thirteen thousand, three hundred one".