12212222121111 has 8 divisors (see below), whose sum is σ = 16282995112944. Its totient is φ = 8141465271680.

The previous prime is 12212222121107. The next prime is 12212222121131. The reversal of 12212222121111 is 11112122221221.

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 12212222121111 - 2² = 12212222121107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212222121131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2143650 + ... + 5386991.

It is an arithmetic number, because the mean of its divisors is an integer number (2035374389118).

Almost surely, 2^{12212222121111} is an apocalyptic number.

12212222121111 is a deficient number, since it is larger than the sum of its proper divisors (4070772991833).

12212222121111 is an equidigital number, since it uses as much as digits as its factorization.

12212222121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071201.

The product of its digits is 128, while the sum is 21.

Adding to 12212222121111 its reverse (11112122221221), we get a palindrome (23324344342332).

The spelling of 12212222121111 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".