1121721708 has 24 divisors (see below), whose sum is σ = 2617933248. Its totient is φ = 373824016.

The previous prime is 1121721683. The next prime is 1121721751. The reversal of 1121721708 is 8071271211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71635 + ... + 85877.

It is an arithmetic number, because the mean of its divisors is an integer number (109080552).

Almost surely, 2^1121721708 is an apocalyptic number.

It is an amenable number.

1121721708 is an abundant number, since it is smaller than the sum of its proper divisors (1496211540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121721708 is a wasteful number, since it uses less digits than its factorization.

1121721708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20813 (or 20811 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 30.

The square root of 1121721708 is about 33492.1141166096. The cubic root of 1121721708 is about 1039.0306883221.

Adding to 1121721708 its reverse (8071271211), we get a palindrome (9192992919).

The spelling of 1121721708 in words is "one billion, one hundred twenty-one million, seven hundred twenty-one thousand, seven hundred eight".