2180120149 has 4 divisors (see below), whose sum is σ = 2186403264. Its totient is φ = 2173837036.

The previous prime is 2180120147. The next prime is 2180120161. The reversal of 2180120149 is 9410210812.

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 not a de Polignac number, because 2180120149 - 2¹ = 2180120147 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 (2180120141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3141037 + ... + 3141730.

It is an arithmetic number, because the mean of its divisors is an integer number (546600816).

Almost surely, 2^2180120149 is an apocalyptic number.

It is an amenable number.

2180120149 is a deficient number, since it is larger than the sum of its proper divisors (6283115).

2180120149 is an equidigital number, since it uses as much as digits as its factorization.

2180120149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283114.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 2180120149 is about 46691.7567564126. The cubic root of 2180120149 is about 1296.6620776054.

The spelling of 2180120149 in words is "two billion, one hundred eighty million, one hundred twenty thousand, one hundred forty-nine".