1111232121 has 16 divisors (see below), whose sum is σ = 1535060160. Its totient is φ = 714190400.

The previous prime is 1111232053. The next prime is 1111232159. The reversal of 1111232121 is 1212321111.

It is a cyclic number.

It is not a de Polignac number, because 1111232121 - 2⁷ = 1111231993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111232121.

It is not an unprimeable number, because it can be changed into a prime (1111232321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50071 + ... + 68771.

It is an arithmetic number, because the mean of its divisors is an integer number (95941260).

Almost surely, 2^1111232121 is an apocalyptic number.

It is an amenable number.

1111232121 is a deficient number, since it is larger than the sum of its proper divisors (423828039).

1111232121 is a wasteful number, since it uses less digits than its factorization.

1111232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19416.

The product of its digits is 24, while the sum is 15.

The square root of 1111232121 is about 33335.1484322479. The cubic root of 1111232121 is about 1035.7817678724.

Adding to 1111232121 its reverse (1212321111), we get a palindrome (2323553232).

The spelling of 1111232121 in words is "one billion, one hundred eleven million, two hundred thirty-two thousand, one hundred twenty-one".