1121899105 has 8 divisors (see below), whose sum is σ = 1425471912. Its totient is φ = 844723968.

The previous prime is 1121899091. The next prime is 1121899109. The reversal of 1121899105 is 5019981211.

It can be written as a sum of positive squares in 4 ways, for example, as 205262929 + 916636176 = 14327^2 + 30276^2 .

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 1121899105 - 2⁵ = 1121899073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121899109) 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, 6599322 + ... + 6599491.

It is an arithmetic number, because the mean of its divisors is an integer number (178183989).

Almost surely, 2^1121899105 is an apocalyptic number.

It is an amenable number.

1121899105 is a deficient number, since it is larger than the sum of its proper divisors (303572807).

1121899105 is a wasteful number, since it uses less digits than its factorization.

1121899105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13198835.

The product of its (nonzero) digits is 6480, while the sum is 37.

The square root of 1121899105 is about 33494.7623517469. The cubic root of 1121899105 is about 1039.0854586541.

The spelling of 1121899105 in words is "one billion, one hundred twenty-one million, eight hundred ninety-nine thousand, one hundred five".