2120120191 has 12 divisors (see below), whose sum is σ = 2468740680. Its totient is φ = 1815419760.

The previous prime is 2120120183. The next prime is 2120120237. The reversal of 2120120191 is 1910210212.

It is a happy number.

It is not a de Polignac number, because 2120120191 - 2³ = 2120120183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120120161) 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, 28701 + ... + 71161.

It is an arithmetic number, because the mean of its divisors is an integer number (205728390).

Almost surely, 2^2120120191 is an apocalyptic number.

2120120191 is a deficient number, since it is larger than the sum of its proper divisors (348620489).

2120120191 is a wasteful number, since it uses less digits than its factorization.

2120120191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43494 (or 43487 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 2120120191 is about 46044.7629052425. The cubic root of 2120120191 is about 1284.6559341662.

The spelling of 2120120191 in words is "two billion, one hundred twenty million, one hundred twenty thousand, one hundred ninety-one".