21251135062363 has 2 divisors, whose sum is σ = 21251135062364. Its totient is φ = 21251135062362.

The previous prime is 21251135062351. The next prime is 21251135062369. The reversal of 21251135062363 is 36326053115212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21251135062363 - 2³⁷ = 21113696108891 is a prime.

It is a super-2 number, since 2×21251135062363² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21251135062369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625567531181 + 10625567531182.

It is an arithmetic number, because the mean of its divisors is an integer number (10625567531182).

Almost surely, 2^{21251135062363} is an apocalyptic number.

21251135062363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21251135062363 is an equidigital number, since it uses as much as digits as its factorization.

21251135062363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 40.

Adding to 21251135062363 its reverse (36326053115212), we get a palindrome (57577188177575).

The spelling of 21251135062363 in words is "twenty-one trillion, two hundred fifty-one billion, one hundred thirty-five million, sixty-two thousand, three hundred sixty-three".