1111343121 has 24 divisors (see below), whose sum is σ = 1840492160. Its totient is φ = 633013056.

The previous prime is 1111343099. The next prime is 1111343131. The reversal of 1111343121 is 1213431111.

It is a happy number.

It is not a de Polignac number, because 1111343121 - 2¹⁰ = 1111342097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111343094 and 1111343103.

It is not an unprimeable number, because it can be changed into a prime (1111343131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8461 + ... + 47898.

Almost surely, 2^1111343121 is an apocalyptic number.

It is an amenable number.

1111343121 is a deficient number, since it is larger than the sum of its proper divisors (729149039).

1111343121 is a wasteful number, since it uses less digits than its factorization.

1111343121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56685 (or 56682 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1111343121 is about 33336.8133000141. The cubic root of 1111343121 is about 1035.8162545010.

Adding to 1111343121 its reverse (1213431111), we get a palindrome (2324774232).

The spelling of 1111343121 in words is "one billion, one hundred eleven million, three hundred forty-three thousand, one hundred twenty-one".