12921265465 has 16 divisors (see below), whose sum is σ = 16009297920. Its totient is φ = 10001309760.

The previous prime is 12921265459. The next prime is 12921265499. The reversal of 12921265465 is 56456212921.

It is not a de Polignac number, because 12921265465 - 2¹¹ = 12921263417 is a prime.

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, 1115976 + ... + 1127494.

It is an arithmetic number, because the mean of its divisors is an integer number (1000581120).

Almost surely, 2^12921265465 is an apocalyptic number.

It is an amenable number.

12921265465 is a deficient number, since it is larger than the sum of its proper divisors (3088032455).

12921265465 is a wasteful number, since it uses less digits than its factorization.

12921265465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18792.

The product of its digits is 259200, while the sum is 43.

The spelling of 12921265465 in words is "twelve billion, nine hundred twenty-one million, two hundred sixty-five thousand, four hundred sixty-five".