21010507373269 has 2 divisors, whose sum is σ = 21010507373270. Its totient is φ = 21010507373268.

The previous prime is 21010507373267. The next prime is 21010507373287. The reversal of 21010507373269 is 96237370501012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16410074374225 + 4600432999044 = 4050935^2 + 2144862^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010507373269 - 2¹ = 21010507373267 is a prime.

It is a super-2 number, since 2×21010507373269² (a number of 27 digits) contains 22 as substring.

Together with 21010507373267, 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 (21010507373267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505253686634 + 10505253686635.

It is an arithmetic number, because the mean of its divisors is an integer number (10505253686635).

Almost surely, 2^{21010507373269} is an apocalyptic number.

It is an amenable number.

21010507373269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010507373269 is an equidigital number, since it uses as much as digits as its factorization.

21010507373269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 46.

The spelling of 21010507373269 in words is "twenty-one trillion, ten billion, five hundred seven million, three hundred seventy-three thousand, two hundred sixty-nine".