122211212212111 has 4 divisors (see below), whose sum is σ = 133321322413224. Its totient is φ = 111101102011000.

The previous prime is 122211212212097. The next prime is 122211212212171. The reversal of 122211212212111 is 111212212112221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122211212212111 - 2¹¹ = 122211212210063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211212212171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555055100540 + ... + 5555055100561.

It is an arithmetic number, because the mean of its divisors is an integer number (33330330603306).

Almost surely, 2^{122211212212111} is an apocalyptic number.

122211212212111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122211212212111 is a deficient number, since it is larger than the sum of its proper divisors (11110110201113).

122211212212111 is a wasteful number, since it uses less digits than its factorization.

122211212212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110110201112.

The product of its digits is 128, while the sum is 22.

Adding to 122211212212111 its reverse (111212212112221), we get a palindrome (233423424324332).

The spelling of 122211212212111 in words is "one hundred twenty-two trillion, two hundred eleven billion, two hundred twelve million, two hundred twelve thousand, one hundred eleven".