11121431 has 2 divisors, whose sum is σ = 11121432. Its totient is φ = 11121430.

The previous prime is 11121421. The next prime is 11121433. The reversal of 11121431 is 13412111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121431 - 2¹⁴ = 11105047 is a prime.

It is a super-2 number, since 2×11121431² = 247372454975522, which contains 22 as substring.

Together with 11121433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560715 + 5560716.

It is an arithmetic number, because the mean of its divisors is an integer number (5560716).

Almost surely, 2^11121431 is an apocalyptic number.

11121431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121431 is an equidigital number, since it uses as much as digits as its factorization.

11121431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24, while the sum is 14.

The square root of 11121431 is about 3334.8809573956. The cubic root of 11121431 is about 223.2133800533.

Adding to 11121431 its reverse (13412111), we get a palindrome (24533542).

The spelling of 11121431 in words is "eleven million, one hundred twenty-one thousand, four hundred thirty-one".