1121279996 has 18 divisors (see below), whose sum is σ = 1990879128. Its totient is φ = 552465480.

The previous prime is 1121279993. The next prime is 1121280007. The reversal of 1121279996 is 6999721211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121279996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121279993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563315 + ... + 565301.

It is an arithmetic number, because the mean of its divisors is an integer number (110604396).

Almost surely, 2^1121279996 is an apocalyptic number.

It is an amenable number.

1121279996 is a deficient number, since it is larger than the sum of its proper divisors (869599132).

1121279996 is an frugal number, since it uses more digits than its factorization.

1121279996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049 (or 2060 counting only the distinct ones).

The product of its digits is 122472, while the sum is 47.

The square root of 1121279996 is about 33485.5191986028. The cubic root of 1121279996 is about 1038.8942871169.

The spelling of 1121279996 in words is "one billion, one hundred twenty-one million, two hundred seventy-nine thousand, nine hundred ninety-six".