1121303111 has 16 divisors (see below), whose sum is σ = 1163289600. Its totient is φ = 1080208800.

The previous prime is 1121303081. The next prime is 1121303143. The reversal of 1121303111 is 1113031211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121303111 - 2¹⁰ = 1121302087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121603111) 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, 944060 + ... + 945246.

It is an arithmetic number, because the mean of its divisors is an integer number (72705600).

Almost surely, 2^1121303111 is an apocalyptic number.

1121303111 is a deficient number, since it is larger than the sum of its proper divisors (41986489).

1121303111 is a wasteful number, since it uses less digits than its factorization.

1121303111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1121303111 is about 33485.8643460192. The cubic root of 1121303111 is about 1038.9014259453.

Adding to 1121303111 its reverse (1113031211), we get a palindrome (2234334322).

The spelling of 1121303111 in words is "one billion, one hundred twenty-one million, three hundred three thousand, one hundred eleven".