1121011223 has 4 divisors (see below), whose sum is σ = 1121910000. Its totient is φ = 1120112448.

The previous prime is 1121011207. The next prime is 1121011273. The reversal of 1121011223 is 3221101211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121011223 - 2⁴ = 1121011207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121011198 and 1121011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121011273) by changing a digit.

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, 447515 + ... + 450012.

It is an arithmetic number, because the mean of its divisors is an integer number (280477500).

Almost surely, 2^1121011223 is an apocalyptic number.

1121011223 is a deficient number, since it is larger than the sum of its proper divisors (898777).

1121011223 is an equidigital number, since it uses as much as digits as its factorization.

1121011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898776.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1121011223 is about 33481.5056859754. The cubic root of 1121011223 is about 1038.8112721552.

Adding to 1121011223 its reverse (3221101211), we get a palindrome (4342112434).

The spelling of 1121011223 in words is "one billion, one hundred twenty-one million, eleven thousand, two hundred twenty-three".