21224146839523 has 2 divisors, whose sum is σ = 21224146839524. Its totient is φ = 21224146839522.

The previous prime is 21224146839419. The next prime is 21224146839641. The reversal of 21224146839523 is 32593864142212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21224146839523 - 2⁹ = 21224146839011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21224146839823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612073419761 + 10612073419762.

It is an arithmetic number, because the mean of its divisors is an integer number (10612073419762).

Almost surely, 2^{21224146839523} is an apocalyptic number.

21224146839523 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224146839523 is an equidigital number, since it uses as much as digits as its factorization.

21224146839523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 52.

The spelling of 21224146839523 in words is "twenty-one trillion, two hundred twenty-four billion, one hundred forty-six million, eight hundred thirty-nine thousand, five hundred twenty-three".