121122431 has 4 divisors (see below), whose sum is σ = 123699552. Its totient is φ = 118545312.

The previous prime is 121122413. The next prime is 121122493. The reversal of 121122431 is 134221121.

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 121122431 - 2¹⁸ = 120860287 is a prime.

It is a super-2 number, since 2×121122431² = 29341286582699522, 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 (121122401) 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, 1288490 + ... + 1288583.

It is an arithmetic number, because the mean of its divisors is an integer number (30924888).

Almost surely, 2^121122431 is an apocalyptic number.

121122431 is a deficient number, since it is larger than the sum of its proper divisors (2577121).

121122431 is an equidigital number, since it uses as much as digits as its factorization.

121122431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577120.

The product of its digits is 96, while the sum is 17.

The square root of 121122431 is about 11005.5636384512. The cubic root of 121122431 is about 494.7755074951.

Adding to 121122431 its reverse (134221121), we get a palindrome (255343552).

The spelling of 121122431 in words is "one hundred twenty-one million, one hundred twenty-two thousand, four hundred thirty-one".