1212121122227 has 2 divisors, whose sum is σ = 1212121122228. Its totient is φ = 1212121122226.

The previous prime is 1212121122181. The next prime is 1212121122229. The reversal of 1212121122227 is 7222211212121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212121122227 - 2¹⁰ = 1212121121203 is a prime.

It is a super-3 number, since 3×1212121122227³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 1212121122229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212121122196 and 1212121122205.

It is not a weakly prime, because it can be changed into another prime (1212121122229) 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 as a sum of consecutive naturals, namely, 606060561113 + 606060561114.

It is an arithmetic number, because the mean of its divisors is an integer number (606060561114).

Almost surely, 2^{1212121122227} is an apocalyptic number.

1212121122227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212121122227 is an equidigital number, since it uses as much as digits as its factorization.

1212121122227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 26.

Adding to 1212121122227 its reverse (7222211212121), we get a palindrome (8434332334348).

The spelling of 1212121122227 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-seven".