121891333 has 4 divisors (see below), whose sum is σ = 123074848. Its totient is φ = 120707820.

The previous prime is 121891331. The next prime is 121891339. The reversal of 121891333 is 333198121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121891333 - 2¹ = 121891331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121891295 and 121891304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121891331) 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, 591603 + ... + 591808.

It is an arithmetic number, because the mean of its divisors is an integer number (30768712).

Almost surely, 2^121891333 is an apocalyptic number.

It is an amenable number.

121891333 is a deficient number, since it is larger than the sum of its proper divisors (1183515).

121891333 is a wasteful number, since it uses less digits than its factorization.

121891333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183514.

The product of its digits is 3888, while the sum is 31.

The square root of 121891333 is about 11040.4407973595. The cubic root of 121891333 is about 495.8202677033.

The spelling of 121891333 in words is "one hundred twenty-one million, eight hundred ninety-one thousand, three hundred thirty-three".