21250262512373 has 2 divisors, whose sum is σ = 21250262512374. Its totient is φ = 21250262512372.

The previous prime is 21250262512337. The next prime is 21250262512397. The reversal of 21250262512373 is 37321526205212.

Together with previous prime (21250262512337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13355275233169 + 7894987279204 = 3654487^2 + 2809802^2 .

It is a cyclic number.

It is not a de Polignac number, because 21250262512373 - 2⁶ = 21250262512309 is a prime.

It is a super-2 number, since 2×21250262512373² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21250262512373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21250262512573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625131256186 + 10625131256187.

It is an arithmetic number, because the mean of its divisors is an integer number (10625131256187).

Almost surely, 2^{21250262512373} is an apocalyptic number.

It is an amenable number.

21250262512373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250262512373 is an equidigital number, since it uses as much as digits as its factorization.

21250262512373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 41.

Adding to 21250262512373 its reverse (37321526205212), we get a palindrome (58571788717585).

The spelling of 21250262512373 in words is "twenty-one trillion, two hundred fifty billion, two hundred sixty-two million, five hundred twelve thousand, three hundred seventy-three".