121226818 has 16 divisors (see below), whose sum is σ = 186105600. Its totient is φ = 59197216.

The previous prime is 121226797. The next prime is 121226839. The reversal of 121226818 is 818622121.

It is an interprime number because it is at equal distance from previous prime (121226797) and next prime (121226839).

It is a self number, because there is not a number n which added to its sum of digits gives 121226818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55230 + ... + 57382.

It is an arithmetic number, because the mean of its divisors is an integer number (11631600).

Almost surely, 2^121226818 is an apocalyptic number.

121226818 is a deficient number, since it is larger than the sum of its proper divisors (64878782).

121226818 is a wasteful number, since it uses less digits than its factorization.

121226818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801.

The product of its digits is 3072, while the sum is 31.

The square root of 121226818 is about 11010.3050820584. The cubic root of 121226818 is about 494.9176042156.

Adding to 121226818 its reverse (818622121), we get a palindrome (939848939).

The spelling of 121226818 in words is "one hundred twenty-one million, two hundred twenty-six thousand, eight hundred eighteen".