1121124989 has 2 divisors, whose sum is σ = 1121124990. Its totient is φ = 1121124988.

The previous prime is 1121124973. The next prime is 1121125043. The reversal of 1121124989 is 9894211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722803225 + 398321764 = 26885^2 + 19958^2 .

It is an emirp because it is prime and its reverse (9894211211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121124989 - 2⁴ = 1121124973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121124919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560562494 + 560562495.

It is an arithmetic number, because the mean of its divisors is an integer number (560562495).

Almost surely, 2^1121124989 is an apocalyptic number.

It is an amenable number.

1121124989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121124989 is an equidigital number, since it uses as much as digits as its factorization.

1121124989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 1121124989 is about 33483.2045808044. The cubic root of 1121124989 is about 1038.8464122749.

The spelling of 1121124989 in words is "one billion, one hundred twenty-one million, one hundred twenty-four thousand, nine hundred eighty-nine".