1121111212 has 48 divisors (see below), whose sum is σ = 2146872672. Its totient is φ = 509160960.

The previous prime is 1121111209. The next prime is 1121111227. The reversal of 1121111212 is 2121111211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1121111192 and 1121111201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1816728 + ... + 1817344.

It is an arithmetic number, because the mean of its divisors is an integer number (44726514).

Almost surely, 2^1121111212 is an apocalyptic number.

It is an amenable number.

1121111212 is a deficient number, since it is larger than the sum of its proper divisors (1025761460).

1121111212 is a wasteful number, since it uses less digits than its factorization.

1121111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

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

The square root of 1121111212 is about 33482.9988501627. The cubic root of 1121111212 is about 1038.8421569522.

Adding to 1121111212 its reverse (2121111211), we get a palindrome (3242222423).

Subtracting 1121111212 from its reverse (2121111211), we obtain a palindrome (999999999).

The spelling of 1121111212 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twelve".