1211121112 has 8 divisors (see below), whose sum is σ = 2270852100. Its totient is φ = 605560552.

The previous prime is 1211121091. The next prime is 1211121139. The reversal of 1211121112 is 2111211121.

It is a happy number.

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

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 junction number, because it is equal to n+sod(n) for n = 1211121092 and 1211121101.

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 as a sum of consecutive naturals, namely, 75695062 + ... + 75695077.

Almost surely, 2^1211121112 is an apocalyptic number.

It is an amenable number.

1211121112 is a deficient number, since it is larger than the sum of its proper divisors (1059730988).

1211121112 is a wasteful number, since it uses less digits than its factorization.

1211121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151390145 (or 151390141 counting only the distinct ones).

The product of its digits is 8, while the sum is 13.

The square root of 1211121112 is about 34801.1653827857. The cubic root of 1211121112 is about 1065.9312424632.

Adding to 1211121112 its reverse (2111211121), we get a palindrome (3322332233).

Subtracting 1211121112 from its reverse (2111211121), we obtain a palindrome (900090009).

The spelling of 1211121112 in words is "one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twelve".