2120250155 has 4 divisors (see below), whose sum is σ = 2544300192. Its totient is φ = 1696200120.

The previous prime is 2120250151. The next prime is 2120250161. The reversal of 2120250155 is 5510520212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2120250155 - 2² = 2120250151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120250155.

It is not an unprimeable number, because it can be changed into a prime (2120250151) 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 3 ways as a sum of consecutive naturals, for example, 212025011 + ... + 212025020.

It is an arithmetic number, because the mean of its divisors is an integer number (636075048).

Almost surely, 2^2120250155 is an apocalyptic number.

2120250155 is a deficient number, since it is larger than the sum of its proper divisors (424050037).

2120250155 is an equidigital number, since it uses as much as digits as its factorization.

2120250155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424050036.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2120250155 is about 46046.1741624644. The cubic root of 2120250155 is about 1284.6821835605.

Adding to 2120250155 its reverse (5510520212), we get a palindrome (7630770367).

The spelling of 2120250155 in words is "two billion, one hundred twenty million, two hundred fifty thousand, one hundred fifty-five".