21000013021301 has 2 divisors, whose sum is σ = 21000013021302. Its totient is φ = 21000013021300.

The previous prime is 21000013021279. The next prime is 21000013021349. The reversal of 21000013021301 is 10312031000012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20842201486276 + 157811535025 = 4565326^2 + 397255^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000013021301 - 2¹⁴ = 21000013004917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000013021381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500006510650 + 10500006510651.

It is an arithmetic number, because the mean of its divisors is an integer number (10500006510651).

Almost surely, 2^{21000013021301} is an apocalyptic number.

It is an amenable number.

21000013021301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000013021301 is an equidigital number, since it uses as much as digits as its factorization.

21000013021301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21000013021301 its reverse (10312031000012), we get a palindrome (31312044021313).

The spelling of 21000013021301 in words is "twenty-one trillion, thirteen million, twenty-one thousand, three hundred one".