21374443283251 has 2 divisors, whose sum is σ = 21374443283252. Its totient is φ = 21374443283250.

The previous prime is 21374443283213. The next prime is 21374443283273. The reversal of 21374443283251 is 15238234447312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21374443283251 - 2³⁵ = 21340083544883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21374443283195 and 21374443283204.

It is not a weakly prime, because it can be changed into another prime (21374443083251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687221641625 + 10687221641626.

It is an arithmetic number, because the mean of its divisors is an integer number (10687221641626).

Almost surely, 2^{21374443283251} is an apocalyptic number.

21374443283251 is a deficient number, since it is larger than the sum of its proper divisors (1).

21374443283251 is an equidigital number, since it uses as much as digits as its factorization.

21374443283251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 49.

The spelling of 21374443283251 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred forty-three million, two hundred eighty-three thousand, two hundred fifty-one".