121884431 has 4 divisors (see below), whose sum is σ = 124857264. Its totient is φ = 118911600.

The previous prime is 121884353. The next prime is 121884437. The reversal of 121884431 is 134488121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121884431 - 2¹⁰ = 121883407 is a prime.

It is a super-2 number, since 2×121884431² = 29711629040387522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121884437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1486355 + ... + 1486436.

It is an arithmetic number, because the mean of its divisors is an integer number (31214316).

Almost surely, 2^121884431 is an apocalyptic number.

121884431 is a deficient number, since it is larger than the sum of its proper divisors (2972833).

121884431 is an equidigital number, since it uses as much as digits as its factorization.

121884431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972832.

The product of its digits is 6144, while the sum is 32.

The square root of 121884431 is about 11040.1282148352. The cubic root of 121884431 is about 495.8109090503.

The spelling of 121884431 in words is "one hundred twenty-one million, eight hundred eighty-four thousand, four hundred thirty-one".