21301125415 has 16 divisors (see below), whose sum is σ = 25989666912. Its totient is φ = 16756274304.

The previous prime is 21301125403. The next prime is 21301125463. The reversal of 21301125415 is 51452110312.

It is a cyclic number.

It is not a de Polignac number, because 21301125415 - 2³³ = 12711190823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21301125415.

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, 129517 + ... + 243673.

It is an arithmetic number, because the mean of its divisors is an integer number (1624354182).

Almost surely, 2^21301125415 is an apocalyptic number.

21301125415 is a deficient number, since it is larger than the sum of its proper divisors (4688541497).

21301125415 is a wasteful number, since it uses less digits than its factorization.

21301125415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114786.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 21301125415 its reverse (51452110312), we get a palindrome (72753235727).

The spelling of 21301125415 in words is "twenty-one billion, three hundred one million, one hundred twenty-five thousand, four hundred fifteen".