121222636 has 12 divisors (see below), whose sum is σ = 212924320. Its totient is φ = 60387120.

The previous prime is 121222613. The next prime is 121222637. The reversal of 121222636 is 636222121.

It is a self number, because there is not a number n which added to its sum of digits gives 121222636.

It is not an unprimeable number, because it can be changed into a prime (121222637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54831 + ... + 56998.

Almost surely, 2^121222636 is an apocalyptic number.

It is an amenable number.

121222636 is a deficient number, since it is larger than the sum of its proper divisors (91701684).

121222636 is a wasteful number, since it uses less digits than its factorization.

121222636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112104 (or 112102 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 121222636 is about 11010.1151674267. The cubic root of 121222636 is about 494.9119130403.

Adding to 121222636 its reverse (636222121), we get a palindrome (757444757).

The spelling of 121222636 in words is "one hundred twenty-one million, two hundred twenty-two thousand, six hundred thirty-six".