121227618 has 32 divisors (see below), whose sum is σ = 257162112. Its totient is φ = 38016000.

The previous prime is 121227607. The next prime is 121227637. The reversal of 121227618 is 816722121.

It is a super-2 number, since 2×121227618² = 29392270731907848, which contains 22 as substring.

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, 1218 + ... + 15618.

It is an arithmetic number, because the mean of its divisors is an integer number (8036316).

Almost surely, 2^121227618 is an apocalyptic number.

121227618 is an abundant number, since it is smaller than the sum of its proper divisors (135934494).

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

121227618 is a wasteful number, since it uses less digits than its factorization.

121227618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490.

The product of its digits is 2688, while the sum is 30.

The square root of 121227618 is about 11010.3414116003. The cubic root of 121227618 is about 494.9186929000.

Adding to 121227618 its reverse (816722121), we get a palindrome (937949739).

The spelling of 121227618 in words is "one hundred twenty-one million, two hundred twenty-seven thousand, six hundred eighteen".