1121440997 has 2 divisors, whose sum is σ = 1121440998. Its totient is φ = 1121440996.

The previous prime is 1121440993. The next prime is 1121441033. The reversal of 1121440997 is 7990441211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114958881 + 6482116 = 33391^2 + 2546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121440997 - 2² = 1121440993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121440997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121440993) 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 as a sum of consecutive naturals, namely, 560720498 + 560720499.

It is an arithmetic number, because the mean of its divisors is an integer number (560720499).

Almost surely, 2^1121440997 is an apocalyptic number.

It is an amenable number.

1121440997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121440997 is an equidigital number, since it uses as much as digits as its factorization.

1121440997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1121440997 is about 33487.9231514885. The cubic root of 1121440997 is about 1038.9440085705.

The spelling of 1121440997 in words is "one billion, one hundred twenty-one million, four hundred forty thousand, nine hundred ninety-seven".