1121203111 has 8 divisors (see below), whose sum is σ = 1282551840. Its totient is φ = 960148608.

The previous prime is 1121203099. The next prime is 1121203147. The reversal of 1121203111 is 1113021211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121203111 - 2⁵ = 1121203079 is a prime.

It is a super-2 number, since 2×1121203111² = 2514192832232156642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121203091 and 1121203100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121206111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65326 + ... + 80683.

It is an arithmetic number, because the mean of its divisors is an integer number (160318980).

Almost surely, 2^1121203111 is an apocalyptic number.

1121203111 is a deficient number, since it is larger than the sum of its proper divisors (161348729).

1121203111 is a wasteful number, since it uses less digits than its factorization.

1121203111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147113.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1121203111 is about 33484.3711453568. The cubic root of 1121203111 is about 1038.8705412748.

Adding to 1121203111 its reverse (1113021211), we get a palindrome (2234224322).

The spelling of 1121203111 in words is "one billion, one hundred twenty-one million, two hundred three thousand, one hundred eleven".