1212212212111 has 8 divisors (see below), whose sum is σ = 1240418030544. Its totient is φ = 1184007068160.

The previous prime is 1212212212063. The next prime is 1212212212187. The reversal of 1212212212111 is 1112122122121.

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 1212212212111 - 2⁷ = 1212212211983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212212511) 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, 6499125 + ... + 6683041.

It is an arithmetic number, because the mean of its divisors is an integer number (155052253818).

Almost surely, 2^{1212212212111} is an apocalyptic number.

1212212212111 is a deficient number, since it is larger than the sum of its proper divisors (28205818433).

1212212212111 is a wasteful number, since it uses less digits than its factorization.

1212212212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337241.

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

Adding to 1212212212111 its reverse (1112122122121), we get a palindrome (2324334334232).

It can be divided in two parts, 12122122121 and 11, that multiplied together give a palindrome (133343343331).

The spelling of 1212212212111 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twelve thousand, one hundred eleven".