1121871272 has 8 divisors (see below), whose sum is σ = 2103508650. Its totient is φ = 560935632.

The previous prime is 1121871271. The next prime is 1121871281. The reversal of 1121871272 is 2721781211.

It can be written as a sum of positive squares in only one way, i.e., 1020546916 + 101324356 = 31946^2 + 10066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1121871271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70116947 + ... + 70116962.

Almost surely, 2^1121871272 is an apocalyptic number.

It is an amenable number.

1121871272 is a deficient number, since it is larger than the sum of its proper divisors (981637378).

1121871272 is a wasteful number, since it uses less digits than its factorization.

1121871272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140233915 (or 140233911 counting only the distinct ones).

The product of its digits is 3136, while the sum is 32.

The square root of 1121871272 is about 33494.3468662997. The cubic root of 1121871272 is about 1039.0768657529.

The spelling of 1121871272 in words is "one billion, one hundred twenty-one million, eight hundred seventy-one thousand, two hundred seventy-two".