1121212636 has 48 divisors (see below), whose sum is σ = 2050836480. Its totient is φ = 535947840.

The previous prime is 1121212627. The next prime is 1121212643. The reversal of 1121212636 is 6362121211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121212636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3005746 + ... + 3006118.

It is an arithmetic number, because the mean of its divisors is an integer number (42725760).

Almost surely, 2^1121212636 is an apocalyptic number.

It is an amenable number.

1121212636 is a deficient number, since it is larger than the sum of its proper divisors (929623844).

1121212636 is a wasteful number, since it uses less digits than its factorization.

1121212636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 752 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 1121212636 is about 33484.5133755890. The cubic root of 1121212636 is about 1038.8734831188.

Adding to 1121212636 its reverse (6362121211), we get a palindrome (7483333847).

The spelling of 1121212636 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand, six hundred thirty-six".