12221220122111 has 96 divisors (see below), whose sum is σ = 16623614246400. Its totient is φ = 8742514809600.

The previous prime is 12221220122081. The next prime is 12221220122113. The reversal of 12221220122111 is 11122102212221.

It is not a de Polignac number, because 12221220122111 - 2²⁶ = 12221153013247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221220122113) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2952696680 + ... + 2952700818.

It is an arithmetic number, because the mean of its divisors is an integer number (173162648400).

Almost surely, 2^{12221220122111} is an apocalyptic number.

12221220122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12221220122111 is a deficient number, since it is larger than the sum of its proper divisors (4402394124289).

12221220122111 is a wasteful number, since it uses less digits than its factorization.

12221220122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581 (or 5570 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12221220122111 its reverse (11122102212221), we get a palindrome (23343322334332).

The spelling of 12221220122111 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".