1121412243 has 48 divisors (see below), whose sum is σ = 1849585920. Its totient is φ = 590385024.

The previous prime is 1121412239. The next prime is 1121412251. The reversal of 1121412243 is 3422141211.

It is not a de Polignac number, because 1121412243 - 2² = 1121412239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1121412263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 545205 + ... + 547257.

It is an arithmetic number, because the mean of its divisors is an integer number (38533040).

Almost surely, 2^1121412243 is an apocalyptic number.

1121412243 is a deficient number, since it is larger than the sum of its proper divisors (728173677).

1121412243 is a wasteful number, since it uses less digits than its factorization.

1121412243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2119 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1121412243 is about 33487.4938297867. The cubic root of 1121412243 is about 1038.9351289084.

Adding to 1121412243 its reverse (3422141211), we get a palindrome (4543553454).

The spelling of 1121412243 in words is "one billion, one hundred twenty-one million, four hundred twelve thousand, two hundred forty-three".