121133191 has 4 divisors (see below), whose sum is σ = 121520512. Its totient is φ = 120745872.

The previous prime is 121133179. The next prime is 121133197. The reversal of 121133191 is 191331121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191331121 = 19 ⋅10070059.

It is a cyclic number.

It is not a de Polignac number, because 121133191 - 2¹³ = 121124999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121133197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193191 + ... + 193816.

It is an arithmetic number, because the mean of its divisors is an integer number (30380128).

Almost surely, 2^121133191 is an apocalyptic number.

121133191 is a deficient number, since it is larger than the sum of its proper divisors (387321).

121133191 is an equidigital number, since it uses as much as digits as its factorization.

121133191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387320.

The product of its digits is 162, while the sum is 22.

The square root of 121133191 is about 11006.0524712542. The cubic root of 121133191 is about 494.7901583096.

The spelling of 121133191 in words is "one hundred twenty-one million, one hundred thirty-three thousand, one hundred ninety-one".