1121219979 has 8 divisors (see below), whose sum is σ = 1630865472. Its totient is φ = 679527240.

The previous prime is 1121219977. The next prime is 1121219987. The reversal of 1121219979 is 9799121211.

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

It is not a de Polignac number, because 1121219979 - 2¹ = 1121219977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121219979.

It is not an unprimeable number, because it can be changed into a prime (1121219977) 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, 16988149 + ... + 16988214.

It is an arithmetic number, because the mean of its divisors is an integer number (203858184).

Almost surely, 2^1121219979 is an apocalyptic number.

1121219979 is a deficient number, since it is larger than the sum of its proper divisors (509645493).

1121219979 is a wasteful number, since it uses less digits than its factorization.

1121219979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33976377.

The product of its digits is 20412, while the sum is 42.

The square root of 1121219979 is about 33484.6230231132. The cubic root of 1121219979 is about 1038.8757510298.

The spelling of 1121219979 in words is "one billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred seventy-nine".