2021112122191 has 2 divisors, whose sum is σ = 2021112122192. Its totient is φ = 2021112122190.

The previous prime is 2021112122173. The next prime is 2021112122201. The reversal of 2021112122191 is 1912212111202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021112122191 - 2³⁵ = 1986752383823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021112122291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010556061095 + 1010556061096.

It is an arithmetic number, because the mean of its divisors is an integer number (1010556061096).

Almost surely, 2^{2021112122191} is an apocalyptic number.

2021112122191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021112122191 is an equidigital number, since it uses as much as digits as its factorization.

2021112122191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 2021112122191 its reverse (1912212111202), we get a palindrome (3933324233393).

The spelling of 2021112122191 in words is "two trillion, twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, one hundred ninety-one".