122221201221111 has 16 divisors (see below), whose sum is σ = 163790201067264. Its totient is φ = 81067391107584.

The previous prime is 122221201221103. The next prime is 122221201221113. The reversal of 122221201221111 is 111122102122221.

It is not a de Polignac number, because 122221201221111 - 2³ = 122221201221103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221201221113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110701866 + ... + 111800471.

It is an arithmetic number, because the mean of its divisors is an integer number (10236887566704).

Almost surely, 2^{122221201221111} is an apocalyptic number.

122221201221111 is a deficient number, since it is larger than the sum of its proper divisors (41568999846153).

122221201221111 is a wasteful number, since it uses less digits than its factorization.

122221201221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222503270.

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

Adding to 122221201221111 its reverse (111122102122221), we get a palindrome (233343303343332).

The spelling of 122221201221111 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred eleven".