1121244391 has 2 divisors, whose sum is σ = 1121244392. Its totient is φ = 1121244390.

The previous prime is 1121244353. The next prime is 1121244403. The reversal of 1121244391 is 1934421211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121244391 - 2¹³ = 1121236199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121244331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560622195 + 560622196.

It is an arithmetic number, because the mean of its divisors is an integer number (560622196).

Almost surely, 2^1121244391 is an apocalyptic number.

1121244391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121244391 is an equidigital number, since it uses as much as digits as its factorization.

1121244391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 1121244391 is about 33484.9875466604. The cubic root of 1121244391 is about 1038.8832906893.

The spelling of 1121244391 in words is "one billion, one hundred twenty-one million, two hundred forty-four thousand, three hundred ninety-one".