1121212112 has 20 divisors (see below), whose sum is σ = 2172883620. Its totient is φ = 560467968.

The previous prime is 1121212109. The next prime is 1121212129. The reversal of 1121212112 is 2112121211.

It can be written as a sum of positive squares in 2 ways, for example, as 93624976 + 1027587136 = 9676^2 + 32056^2 .

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99098 + ... + 109830.

It is an arithmetic number, because the mean of its divisors is an integer number (108644181).

Almost surely, 2^1121212112 is an apocalyptic number.

It is an amenable number.

1121212112 is a deficient number, since it is larger than the sum of its proper divisors (1051671508).

1121212112 is a wasteful number, since it uses less digits than its factorization.

1121212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17270 (or 17264 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 1121212112 is about 33484.5055510754. The cubic root of 1121212112 is about 1038.8733212792.

Adding to 1121212112 its reverse (2112121211), we get a palindrome (3233333323).

Subtracting 1121212112 from its reverse (2112121211), we obtain a palindrome (990909099).

It can be divided in two parts, 112121211 and 2, that multiplied together give a palindrome (224242422).

The spelling of 1121212112 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twelve".