2120220191 has 2 divisors, whose sum is σ = 2120220192. Its totient is φ = 2120220190.

The previous prime is 2120220187. The next prime is 2120220233. The reversal of 2120220191 is 1910220212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120220191 - 2² = 2120220187 is a prime.

It is a super-3 number, since 3×2120220191³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120220101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060110095 + 1060110096.

It is an arithmetic number, because the mean of its divisors is an integer number (1060110096).

Almost surely, 2^2120220191 is an apocalyptic number.

2120220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120220191 is an equidigital number, since it uses as much as digits as its factorization.

2120220191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2120220191 is about 46045.8487922636. The cubic root of 2120220191 is about 1284.6761316962.

The spelling of 2120220191 in words is "two billion, one hundred twenty million, two hundred twenty thousand, one hundred ninety-one".