21002225323315 has 16 divisors (see below), whose sum is σ = 25217281324800. Its totient is φ = 16792041763840.

The previous prime is 21002225323307. The next prime is 21002225323333. The reversal of 21002225323315 is 51332352220012.

It is not a de Polignac number, because 21002225323315 - 2³ = 21002225323307 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81656286 + ... + 81913084.

It is an arithmetic number, because the mean of its divisors is an integer number (1576080082800).

Almost surely, 2^{21002225323315} is an apocalyptic number.

21002225323315 is a deficient number, since it is larger than the sum of its proper divisors (4215056001485).

21002225323315 is a wasteful number, since it uses less digits than its factorization.

21002225323315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266222.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 21002225323315 its reverse (51332352220012), we get a palindrome (72334577543327).

The spelling of 21002225323315 in words is "twenty-one trillion, two billion, two hundred twenty-five million, three hundred twenty-three thousand, three hundred fifteen".