1121636140 has 24 divisors (see below), whose sum is σ = 2356099200. Its totient is φ = 448528128.

The previous prime is 1121636111. The next prime is 1121636227. The reversal of 1121636140 is 416361211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102661 + ... + 113059.

It is an arithmetic number, because the mean of its divisors is an integer number (98170800).

Almost surely, 2^1121636140 is an apocalyptic number.

1121636140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121636140 is an abundant number, since it is smaller than the sum of its proper divisors (1234463060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121636140 is a wasteful number, since it uses less digits than its factorization.

1121636140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15801 (or 15799 counting only the distinct ones).

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

The square root of 1121636140 is about 33490.8366572112. The cubic root of 1121636140 is about 1039.0042676160.

Adding to 1121636140 its reverse (416361211), we get a palindrome (1537997351).

The spelling of 1121636140 in words is "one billion, one hundred twenty-one million, six hundred thirty-six thousand, one hundred forty".