121840236 has 72 divisors (see below), whose sum is σ = 370522880. Its totient is φ = 32978016.

The previous prime is 121840231. The next prime is 121840247. The reversal of 121840236 is 632048121.

It is not an unprimeable number, because it can be changed into a prime (121840231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7936 + ... + 17511.

Almost surely, 2^121840236 is an apocalyptic number.

It is an amenable number.

121840236 is an abundant number, since it is smaller than the sum of its proper divisors (248682644).

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

121840236 is a wasteful number, since it uses less digits than its factorization.

121840236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25483 (or 25478 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 121840236 is about 11038.1264714624. The cubic root of 121840236 is about 495.7509751934.

Adding to 121840236 its reverse (632048121), we get a palindrome (753888357).

The spelling of 121840236 in words is "one hundred twenty-one million, eight hundred forty thousand, two hundred thirty-six".