120021021191 has 2 divisors, whose sum is σ = 120021021192. Its totient is φ = 120021021190.

The previous prime is 120021021167. The next prime is 120021021193. The reversal of 120021021191 is 191120120021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120021021191 - 2¹⁰ = 120021020167 is a prime.

Together with 120021021193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021021193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010510595 + 60010510596.

It is an arithmetic number, because the mean of its divisors is an integer number (60010510596).

Almost surely, 2^120021021191 is an apocalyptic number.

120021021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021021191 is an equidigital number, since it uses as much as digits as its factorization.

120021021191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 120021021191 in words is "one hundred twenty billion, twenty-one million, twenty-one thousand, one hundred ninety-one".