21131012202301 has 2 divisors, whose sum is σ = 21131012202302. Its totient is φ = 21131012202300.

The previous prime is 21131012202299. The next prime is 21131012202319. The reversal of 21131012202301 is 10320221013112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11700155461401 + 9430856740900 = 3420549^2 + 3070970^2 .

It is a cyclic number.

It is not a de Polignac number, because 21131012202301 - 2¹ = 21131012202299 is a prime.

Together with 21131012202299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131012202341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565506101150 + 10565506101151.

It is an arithmetic number, because the mean of its divisors is an integer number (10565506101151).

Almost surely, 2^{21131012202301} is an apocalyptic number.

It is an amenable number.

21131012202301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131012202301 is an equidigital number, since it uses as much as digits as its factorization.

21131012202301 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 21131012202301 its reverse (10320221013112), we get a palindrome (31451233215413).

The spelling of 21131012202301 in words is "twenty-one trillion, one hundred thirty-one billion, twelve million, two hundred two thousand, three hundred one".