11121731 has 2 divisors, whose sum is σ = 11121732. Its totient is φ = 11121730.

The previous prime is 11121713. The next prime is 11121743. The reversal of 11121731 is 13712111.

Together with previous prime (11121713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121731 - 2⁶ = 11121667 is a prime.

It is a super-2 number, since 2×11121731² = 247385800872722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11121431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560865 + 5560866.

It is an arithmetic number, because the mean of its divisors is an integer number (5560866).

Almost surely, 2^11121731 is an apocalyptic number.

11121731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121731 is an equidigital number, since it uses as much as digits as its factorization.

11121731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 17.

The square root of 11121731 is about 3334.9259362091. The cubic root of 11121731 is about 223.2153870916.

Adding to 11121731 its reverse (13712111), we get a palindrome (24833842).

The spelling of 11121731 in words is "eleven million, one hundred twenty-one thousand, seven hundred thirty-one".