2121450564405 has 16 divisors (see below), whose sum is σ = 3449965509504. Its totient is φ = 1112892098880.

The previous prime is 2121450564371. The next prime is 2121450564421. The reversal of 2121450564405 is 5044650541212.

It is not a de Polignac number, because 2121450564405 - 2³⁰ = 2120376822581 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, 1159261689 + ... + 1159263518.

It is an arithmetic number, because the mean of its divisors is an integer number (215622844344).

Almost surely, 2^{2121450564405} is an apocalyptic number.

It is an amenable number.

2121450564405 is a deficient number, since it is larger than the sum of its proper divisors (1328514945099).

2121450564405 is a wasteful number, since it uses less digits than its factorization.

2121450564405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318525276.

The product of its (nonzero) digits is 192000, while the sum is 39.

The spelling of 2121450564405 in words is "two trillion, one hundred twenty-one billion, four hundred fifty million, five hundred sixty-four thousand, four hundred five".