1121036636 has 12 divisors (see below), whose sum is σ = 1963955280. Its totient is φ = 559906560.

The previous prime is 1121036597. The next prime is 1121036647. The reversal of 1121036636 is 6366301211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1121036599 and 1121036608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148805 + ... + 156156.

It is an arithmetic number, because the mean of its divisors is an integer number (163662940).

Almost surely, 2^1121036636 is an apocalyptic number.

It is an amenable number.

1121036636 is a deficient number, since it is larger than the sum of its proper divisors (842918644).

1121036636 is a wasteful number, since it uses less digits than its factorization.

1121036636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305884 (or 305882 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1121036636 is about 33481.8851918467. The cubic root of 1121036636 is about 1038.8191219462.

Adding to 1121036636 its reverse (6366301211), we get a palindrome (7487337847).

The spelling of 1121036636 in words is "one billion, one hundred twenty-one million, thirty-six thousand, six hundred thirty-six".