1121242431 has 8 divisors (see below), whose sum is σ = 1520328960. Its totient is φ = 734825432.

The previous prime is 1121242411. The next prime is 1121242469. The reversal of 1121242431 is 1342421211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121242431 - 2²³ = 1112853823 is a prime.

It is a super-2 number, since 2×1121242431² = 2514369178149579522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121242398 and 1121242407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121242411) 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 7 ways as a sum of consecutive naturals, for example, 3167175 + ... + 3167528.

It is an arithmetic number, because the mean of its divisors is an integer number (190041120).

Almost surely, 2^1121242431 is an apocalyptic number.

1121242431 is a deficient number, since it is larger than the sum of its proper divisors (399086529).

1121242431 is an equidigital number, since it uses as much as digits as its factorization.

1121242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334765.

The product of its digits is 384, while the sum is 21.

The square root of 1121242431 is about 33484.9582798008. The cubic root of 1121242431 is about 1038.8826853463.

Adding to 1121242431 its reverse (1342421211), we get a palindrome (2463663642).

The spelling of 1121242431 in words is "one billion, one hundred twenty-one million, two hundred forty-two thousand, four hundred thirty-one".