21335304140225 has 12 divisors (see below), whose sum is σ = 26455840420224. Its totient is φ = 17068202482320.

The previous prime is 21335304140173. The next prime is 21335304140263. The reversal of 21335304140225 is 52204140353312.

It is not a de Polignac number, because 21335304140225 - 2¹⁸ = 21335303878081 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 13936712 + ... + 15391638.

It is an arithmetic number, because the mean of its divisors is an integer number (2204653368352).

Almost surely, 2^{21335304140225} is an apocalyptic number.

21335304140225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21335304140225 is a deficient number, since it is larger than the sum of its proper divisors (5120536279999).

21335304140225 is a wasteful number, since it uses less digits than its factorization.

21335304140225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041504 (or 2041499 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21335304140225 its reverse (52204140353312), we get a palindrome (73539444493537).

The spelling of 21335304140225 in words is "twenty-one trillion, three hundred thirty-five billion, three hundred four million, one hundred forty thousand, two hundred twenty-five".