2120545013 has 12 divisors (see below), whose sum is σ = 2202281292. Its totient is φ = 2041273920.

The previous prime is 2120544991. The next prime is 2120545069. The reversal of 2120545013 is 3105450212.

It can be written as a sum of positive squares in 2 ways, for example, as 930433009 + 1190112004 = 30503^2 + 34498^2 .

It is not a de Polignac number, because 2120545013 - 2²⁶ = 2053436149 is a prime.

It is a super-2 number, since 2×2120545013² = 8993422304318340338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120545013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120545213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126881 + ... + 142617.

It is an arithmetic number, because the mean of its divisors is an integer number (183523441).

Almost surely, 2^2120545013 is an apocalyptic number.

It is an amenable number.

2120545013 is a deficient number, since it is larger than the sum of its proper divisors (81736279).

2120545013 is an equidigital number, since it uses as much as digits as its factorization.

2120545013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892 (or 15845 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2120545013 is about 46049.3758155309. The cubic root of 2120545013 is about 1284.7417333358.

Adding to 2120545013 its reverse (3105450212), we get a palindrome (5225995225).

The spelling of 2120545013 in words is "two billion, one hundred twenty million, five hundred forty-five thousand, thirteen".