1121100989 has 8 divisors (see below), whose sum is σ = 1187778168. Its totient is φ = 1054504960.

The previous prime is 1121100973. The next prime is 1121100991. The reversal of 1121100989 is 9890011211.

It can be written as a sum of positive squares in 4 ways, for example, as 843612025 + 277488964 = 29045^2 + 16658^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121100989 - 2⁴ = 1121100973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121100289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9419 + ... + 48279.

It is an arithmetic number, because the mean of its divisors is an integer number (148472271).

Almost surely, 2^1121100989 is an apocalyptic number.

It is an amenable number.

1121100989 is a deficient number, since it is larger than the sum of its proper divisors (66677179).

1121100989 is a wasteful number, since it uses less digits than its factorization.

1121100989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40575.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 1121100989 is about 33482.8461902509. The cubic root of 1121100989 is about 1038.8389993364.

The spelling of 1121100989 in words is "one billion, one hundred twenty-one million, one hundred thousand, nine hundred eighty-nine".