21201334025 has 12 divisors (see below), whose sum is σ = 26522309532. Its totient is φ = 16810967040.

The previous prime is 21201334003. The next prime is 21201334039. The reversal of 21201334025 is 52043310212.

It can be written as a sum of positive squares in 6 ways, for example, as 10581825424 + 10619508601 = 102868^2 + 103051^2 .

It is not a de Polignac number, because 21201334025 - 2¹⁶ = 21201268489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3749624 + ... + 3755273.

It is an arithmetic number, because the mean of its divisors is an integer number (2210192461).

Almost surely, 2^21201334025 is an apocalyptic number.

21201334025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21201334025 is a deficient number, since it is larger than the sum of its proper divisors (5320975507).

21201334025 is a wasteful number, since it uses less digits than its factorization.

21201334025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505020 (or 7505015 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21201334025 its reverse (52043310212), we get a palindrome (73244644237).

The spelling of 21201334025 in words is "twenty-one billion, two hundred one million, three hundred thirty-four thousand, twenty-five".