121121191 has 2 divisors, whose sum is σ = 121121192. Its totient is φ = 121121190.

The previous prime is 121121183. The next prime is 121121201. The reversal of 121121191 is 191121121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121121191 - 2³ = 121121183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560595 + 60560596.

It is an arithmetic number, because the mean of its divisors is an integer number (60560596).

Almost surely, 2^121121191 is an apocalyptic number.

121121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121191 is an equidigital number, since it uses as much as digits as its factorization.

121121191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 19.

The square root of 121121191 is about 11005.5073031642. The cubic root of 121121191 is about 494.7738190555.

The spelling of 121121191 in words is "one hundred twenty-one million, one hundred twenty-one thousand, one hundred ninety-one".