121082191 has 2 divisors, whose sum is σ = 121082192. Its totient is φ = 121082190.

The previous prime is 121082183. The next prime is 121082207. The reversal of 121082191 is 191280121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121082191 - 2³ = 121082183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121082161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60541095 + 60541096.

It is an arithmetic number, because the mean of its divisors is an integer number (60541096).

Almost surely, 2^121082191 is an apocalyptic number.

121082191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121082191 is an equidigital number, since it uses as much as digits as its factorization.

121082191 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.

The square root of 121082191 is about 11003.7353203355. The cubic root of 121082191 is about 494.7207090252.

The spelling of 121082191 in words is "one hundred twenty-one million, eighty-two thousand, one hundred ninety-one".