21126461325 has 24 divisors (see below), whose sum is σ = 35268212928. Its totient is φ = 11158049280.

The previous prime is 21126461311. The next prime is 21126461341. The reversal of 21126461325 is 52316462112.

It is not a de Polignac number, because 21126461325 - 2¹⁶ = 21126395789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1359684 + ... + 1375133.

It is an arithmetic number, because the mean of its divisors is an integer number (1469508872).

Almost surely, 2^21126461325 is an apocalyptic number.

21126461325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21126461325 is a deficient number, since it is larger than the sum of its proper divisors (14141751603).

21126461325 is a wasteful number, since it uses less digits than its factorization.

21126461325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734933 (or 2734928 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The spelling of 21126461325 in words is "twenty-one billion, one hundred twenty-six million, four hundred sixty-one thousand, three hundred twenty-five".