2121233120191 has 2 divisors, whose sum is σ = 2121233120192. Its totient is φ = 2121233120190.

The previous prime is 2121233120179. The next prime is 2121233120233. The reversal of 2121233120191 is 1910213321212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121233120191 - 2⁵ = 2121233120159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121233120791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060616560095 + 1060616560096.

It is an arithmetic number, because the mean of its divisors is an integer number (1060616560096).

Almost surely, 2^{2121233120191} is an apocalyptic number.

2121233120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121233120191 is an equidigital number, since it uses as much as digits as its factorization.

2121233120191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 2121233120191 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, one hundred twenty thousand, one hundred ninety-one".