1212212112211 has 8 divisors (see below), whose sum is σ = 1214215503120. Its totient is φ = 1210209847392.

The previous prime is 1212212112193. The next prime is 1212212112269. The reversal of 1212212112211 is 1122112122121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1212212112211 - 2²³ = 1212203723603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212212115211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1886985 + ... + 2446453.

It is an arithmetic number, because the mean of its divisors is an integer number (151776937890).

Almost surely, 2^{1212212112211} is an apocalyptic number.

1212212112211 is a deficient number, since it is larger than the sum of its proper divisors (2003390909).

1212212112211 is an equidigital number, since it uses as much as digits as its factorization.

1212212112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563045.

The product of its digits is 64, while the sum is 19.

Adding to 1212212112211 its reverse (1122112122121), we get a palindrome (2334324234332).

The spelling of 1212212112211 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred twelve thousand, two hundred eleven".