2120665213 has 4 divisors (see below), whose sum is σ = 2125206720. Its totient is φ = 2116123708.

The previous prime is 2120665193. The next prime is 2120665219. The reversal of 2120665213 is 3125660212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120665213 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270053 + ... + 2270986.

It is an arithmetic number, because the mean of its divisors is an integer number (531301680).

Almost surely, 2^2120665213 is an apocalyptic number.

It is an amenable number.

2120665213 is a deficient number, since it is larger than the sum of its proper divisors (4541507).

2120665213 is an equidigital number, since it uses as much as digits as its factorization.

2120665213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541506.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2120665213 is about 46050.6809178757. The cubic root of 2120665213 is about 1284.7660074474.

The spelling of 2120665213 in words is "two billion, one hundred twenty million, six hundred sixty-five thousand, two hundred thirteen".