121531933 has 4 divisors (see below), whose sum is σ = 123196828. Its totient is φ = 119867040.

The previous prime is 121531919. The next prime is 121531937. The reversal of 121531933 is 339135121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99460729 + 22071204 = 9973^2 + 4698^2 .

It is a cyclic number.

It is not a de Polignac number, because 121531933 - 2⁵ = 121531901 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 (121531937) 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 3 ways as a sum of consecutive naturals, for example, 832338 + ... + 832483.

It is an arithmetic number, because the mean of its divisors is an integer number (30799207).

Almost surely, 2^121531933 is an apocalyptic number.

It is an amenable number.

121531933 is a deficient number, since it is larger than the sum of its proper divisors (1664895).

121531933 is an equidigital number, since it uses as much as digits as its factorization.

121531933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664894.

The product of its digits is 2430, while the sum is 28.

The square root of 121531933 is about 11024.1522576568. The cubic root of 121531933 is about 495.3324746621.

The spelling of 121531933 in words is "one hundred twenty-one million, five hundred thirty-one thousand, nine hundred thirty-three".