1121800279 has 8 divisors (see below), whose sum is σ = 1148394672. Its totient is φ = 1095407040.

The previous prime is 1121800259. The next prime is 1121800319. The reversal of 1121800279 is 9720081211.

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 1121800279 - 2¹¹ = 1121798231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121800279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121800219) 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, 38974 + ... + 61339.

It is an arithmetic number, because the mean of its divisors is an integer number (143549334).

Almost surely, 2^1121800279 is an apocalyptic number.

1121800279 is a deficient number, since it is larger than the sum of its proper divisors (26594393).

1121800279 is a wasteful number, since it uses less digits than its factorization.

1121800279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100577.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 1121800279 is about 33493.2870736809. The cubic root of 1121800279 is about 1039.0549473915.

The spelling of 1121800279 in words is "one billion, one hundred twenty-one million, eight hundred thousand, two hundred seventy-nine".