1212181226 has 16 divisors (see below), whose sum is σ = 1929412224. Its totient is φ = 569198784.

The previous prime is 1212181199. The next prime is 1212181231. The reversal of 1212181226 is 6221812121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212181195 and 1212181204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22760 + ... + 54243.

It is an arithmetic number, because the mean of its divisors is an integer number (120588264).

Almost surely, 2^1212181226 is an apocalyptic number.

1212181226 is a deficient number, since it is larger than the sum of its proper divisors (717230998).

1212181226 is a wasteful number, since it uses less digits than its factorization.

1212181226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77485.

The product of its digits is 768, while the sum is 26.

The square root of 1212181226 is about 34816.3930641875. The cubic root of 1212181226 is about 1066.2421607458.

Adding to 1212181226 its reverse (6221812121), we get a palindrome (7433993347).

The spelling of 1212181226 in words is "one billion, two hundred twelve million, one hundred eighty-one thousand, two hundred twenty-six".