121433431 has 16 divisors (see below), whose sum is σ = 150534720. Its totient is φ = 95569920.

The previous prime is 121433369. The next prime is 121433437. The reversal of 121433431 is 134334121.

It is not a de Polignac number, because 121433431 - 2⁹ = 121432919 is a prime.

It is a super-2 number, since 2×121433431² = 29492156328863522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121433437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7566 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (9408420).

Almost surely, 2^121433431 is an apocalyptic number.

121433431 is a deficient number, since it is larger than the sum of its proper divisors (29101289).

121433431 is a wasteful number, since it uses less digits than its factorization.

121433431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24954.

The product of its digits is 864, while the sum is 22.

The square root of 121433431 is about 11019.6837976414. The cubic root of 121433431 is about 495.1986156673.

Adding to 121433431 its reverse (134334121), we get a palindrome (255767552).

The spelling of 121433431 in words is "one hundred twenty-one million, four hundred thirty-three thousand, four hundred thirty-one".