2120665215 has 16 divisors (see below), whose sum is σ = 3394515168. Its totient is φ = 1130537856.

The previous prime is 2120665193. The next prime is 2120665219. The reversal of 2120665215 is 5125660212.

It is not a de Polignac number, because 2120665215 - 2¹⁵ = 2120632447 is a prime.

It is a super-2 number, since 2×2120665215² = 8994441908221992450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120665219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7549 + ... + 65561.

It is an arithmetic number, because the mean of its divisors is an integer number (212157198).

Almost surely, 2^2120665215 is an apocalyptic number.

2120665215 is a deficient number, since it is larger than the sum of its proper divisors (1273849953).

2120665215 is a wasteful number, since it uses less digits than its factorization.

2120665215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60458.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2120665215 is about 46050.6809395909. The cubic root of 2120665215 is about 1284.7660078513.

The spelling of 2120665215 in words is "two billion, one hundred twenty million, six hundred sixty-five thousand, two hundred fifteen".