121333431 has 8 divisors (see below), whose sum is σ = 161843824. Its totient is φ = 80856000.

The previous prime is 121333423. The next prime is 121333447. The reversal of 121333431 is 134333121.

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

It is not a de Polignac number, because 121333431 - 2³ = 121333423 is a prime.

It is a super-2 number, since 2×121333431² = 29443602956463522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121333398 and 121333407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2265 + ... + 15741.

It is an arithmetic number, because the mean of its divisors is an integer number (20230478).

Almost surely, 2^121333431 is an apocalyptic number.

121333431 is a deficient number, since it is larger than the sum of its proper divisors (40510393).

121333431 is a wasteful number, since it uses less digits than its factorization.

121333431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16481.

The product of its digits is 648, while the sum is 21.

The square root of 121333431 is about 11015.1455278630. The cubic root of 121333431 is about 495.0626469023.

Adding to 121333431 its reverse (134333121), we get a palindrome (255666552).

The spelling of 121333431 in words is "one hundred twenty-one million, three hundred thirty-three thousand, four hundred thirty-one".