2121265179 has 80 divisors (see below), whose sum is σ = 3629767680. Its totient is φ = 1222776000.

The previous prime is 2121265177. The next prime is 2121265189. The reversal of 2121265179 is 9715621212.

2121265179 is a `hidden beast` number, since 2 + 12 + 126 + 517 + 9 = 666.

It is not a de Polignac number, because 2121265179 - 2¹ = 2121265177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121265177) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1684252 + ... + 1685510.

It is an arithmetic number, because the mean of its divisors is an integer number (45372096).

Almost surely, 2^2121265179 is an apocalyptic number.

2121265179 is a deficient number, since it is larger than the sum of its proper divisors (1508502501).

2121265179 is a wasteful number, since it uses less digits than its factorization.

2121265179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374 (or 1365 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 2121265179 is about 46057.1946496962. The cubic root of 2121265179 is about 1284.8871554780.

The spelling of 2121265179 in words is "two billion, one hundred twenty-one million, two hundred sixty-five thousand, one hundred seventy-nine".