2120545545 has 32 divisors (see below), whose sum is σ = 3509443584. Its totient is φ = 1092249600.

The previous prime is 2120545489. The next prime is 2120545547. The reversal of 2120545545 is 5455450212.

It is not a de Polignac number, because 2120545545 - 2⁶ = 2120545481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120545547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237889 + ... + 246641.

It is an arithmetic number, because the mean of its divisors is an integer number (109670112).

Almost surely, 2^2120545545 is an apocalyptic number.

It is an amenable number.

2120545545 is a deficient number, since it is larger than the sum of its proper divisors (1388898039).

2120545545 is a wasteful number, since it uses less digits than its factorization.

2120545545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313.

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 2120545545 is about 46049.3815919389. The cubic root of 2120545545 is about 1284.7418407740.

Adding to 2120545545 its reverse (5455450212), we get a palindrome (7575995757).

The spelling of 2120545545 in words is "two billion, one hundred twenty million, five hundred forty-five thousand, five hundred forty-five".