21332455125 has 16 divisors (see below), whose sum is σ = 35497205952. Its totient is φ = 11377309200.

The previous prime is 21332454971. The next prime is 21332455153. The reversal of 21332455125 is 52155423312.

It is not a de Polignac number, because 21332455125 - 2⁹ = 21332454613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28442899 + ... + 28443648.

It is an arithmetic number, because the mean of its divisors is an integer number (2218575372).

Almost surely, 2^21332455125 is an apocalyptic number.

21332455125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21332455125 is a deficient number, since it is larger than the sum of its proper divisors (14164750827).

21332455125 is an equidigital number, since it uses as much as digits as its factorization.

21332455125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56886565 (or 56886555 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

Adding to 21332455125 its reverse (52155423312), we get a palindrome (73487878437).

The spelling of 21332455125 in words is "twenty-one billion, three hundred thirty-two million, four hundred fifty-five thousand, one hundred twenty-five".