1121430431 has 4 divisors (see below), whose sum is σ = 1223378664. Its totient is φ = 1019482200.

The previous prime is 1121430421. The next prime is 1121430439. The reversal of 1121430431 is 1340341211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1340341211 = 11 ⋅121849201.

It is not a de Polignac number, because 1121430431 - 2⁶ = 1121430367 is a prime.

It is a super-2 number, since 2×1121430431² = 2515212423145691522, 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 (1121430439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50974100 + ... + 50974121.

It is an arithmetic number, because the mean of its divisors is an integer number (305844666).

Almost surely, 2^1121430431 is an apocalyptic number.

1121430431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121430431 is a deficient number, since it is larger than the sum of its proper divisors (101948233).

1121430431 is a wasteful number, since it uses less digits than its factorization.

1121430431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101948232.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1121430431 is about 33487.7653927520. The cubic root of 1121430431 is about 1038.9407456505.

Adding to 1121430431 its reverse (1340341211), we get a palindrome (2461771642).

The spelling of 1121430431 in words is "one billion, one hundred twenty-one million, four hundred thirty thousand, four hundred thirty-one".