21001003022353 has 2 divisors, whose sum is σ = 21001003022354. Its totient is φ = 21001003022352.

The previous prime is 21001003022347. The next prime is 21001003022407. The reversal of 21001003022353 is 35322030010012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20855726175249 + 145276847104 = 4566807^2 + 381152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21001003022353 - 2²⁵ = 21000969467921 is a prime.

It is not a weakly prime, because it can be changed into another prime (21001003022653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500501511176 + 10500501511177.

It is an arithmetic number, because the mean of its divisors is an integer number (10500501511177).

Almost surely, 2^{21001003022353} is an apocalyptic number.

It is an amenable number.

21001003022353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001003022353 is an equidigital number, since it uses as much as digits as its factorization.

21001003022353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21001003022353 its reverse (35322030010012), we get a palindrome (56323033032365).

The spelling of 21001003022353 in words is "twenty-one trillion, one billion, three million, twenty-two thousand, three hundred fifty-three".