1218888122 has 8 divisors (see below), whose sum is σ = 1829028276. Its totient is φ = 609212032.

The previous prime is 1218888119. The next prime is 1218888127. The reversal of 1218888122 is 2218888121.

It can be written as a sum of positive squares in 2 ways, for example, as 1211109601 + 7778521 = 34801^2 + 2789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1218888122.

It is not an unprimeable number, because it can be changed into a prime (1218888127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109373 + ... + 120000.

Almost surely, 2^1218888122 is an apocalyptic number.

1218888122 is a deficient number, since it is larger than the sum of its proper divisors (610140154).

1218888122 is a wasteful number, since it uses less digits than its factorization.

1218888122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232032.

The product of its digits is 32768, while the sum is 41.

The square root of 1218888122 is about 34912.5782777497. The cubic root of 1218888122 is about 1068.2050209113.

Subtracting 1218888122 from its reverse (2218888121), we obtain a palindrome (999999999).

The spelling of 1218888122 in words is "one billion, two hundred eighteen million, eight hundred eighty-eight thousand, one hundred twenty-two".