121222100191 has 2 divisors, whose sum is σ = 121222100192. Its totient is φ = 121222100190.

The previous prime is 121222100183. The next prime is 121222100221. The reversal of 121222100191 is 191001222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121222100191 - 2³ = 121222100183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121222100171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611050095 + 60611050096.

It is an arithmetic number, because the mean of its divisors is an integer number (60611050096).

Almost surely, 2^121222100191 is an apocalyptic number.

121222100191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222100191 is an equidigital number, since it uses as much as digits as its factorization.

121222100191 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 22.

The spelling of 121222100191 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, one hundred ninety-one".