121333557 has 8 divisors (see below), whose sum is σ = 161892000. Its totient is φ = 80832080.

The previous prime is 121333549. The next prime is 121333561. The reversal of 121333557 is 755333121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121333557 - 2³ = 121333549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8994 + ... + 17987.

It is an arithmetic number, because the mean of its divisors is an integer number (20236500).

Almost surely, 2^121333557 is an apocalyptic number.

121333557 is the 8994-th pentagonal number.

It is an amenable number.

121333557 is a deficient number, since it is larger than the sum of its proper divisors (40558443).

121333557 is a wasteful number, since it uses less digits than its factorization.

121333557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28483.

The product of its digits is 9450, while the sum is 30.

The square root of 121333557 is about 11015.1512472594. The cubic root of 121333557 is about 495.0628182699.

Adding to 121333557 its reverse (755333121), we get a palindrome (876666678).

The spelling of 121333557 in words is "one hundred twenty-one million, three hundred thirty-three thousand, five hundred fifty-seven".