2121409465 has 8 divisors (see below), whose sum is σ = 2909361600. Its totient is φ = 1454680752.

The previous prime is 2121409399. The next prime is 2121409471. The reversal of 2121409465 is 5649041212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121409465 - 2⁹ = 2121408953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121409465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30305815 + ... + 30305884.

It is an arithmetic number, because the mean of its divisors is an integer number (363670200).

Almost surely, 2^2121409465 is an apocalyptic number.

It is an amenable number.

2121409465 is a deficient number, since it is larger than the sum of its proper divisors (787952135).

2121409465 is an equidigital number, since it uses as much as digits as its factorization.

2121409465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60611711.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2121409465 is about 46058.7610015728. The cubic root of 2121409465 is about 1284.9162869961.

The spelling of 2121409465 in words is "two billion, one hundred twenty-one million, four hundred nine thousand, four hundred sixty-five".