122211212121111 has 64 divisors (see below), whose sum is σ = 171637613199360. Its totient is φ = 77267786509440.

The previous prime is 122211212121091. The next prime is 122211212121113. The reversal of 122211212121111 is 111121212112221.

122211212121111 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 122211212121111 - 2¹⁹ = 122211211596823 is a prime.

It is a super-2 number, since 2×122211212121111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211212121113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 383854590 + ... + 384172836.

It is an arithmetic number, because the mean of its divisors is an integer number (2681837706240).

Almost surely, 2^{122211212121111} is an apocalyptic number.

122211212121111 is a deficient number, since it is larger than the sum of its proper divisors (49426401078249).

122211212121111 is a wasteful number, since it uses less digits than its factorization.

122211212121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318844.

The product of its digits is 64, while the sum is 21.

Adding to 122211212121111 its reverse (111121212112221), we get a palindrome (233332424233332).

The spelling of 122211212121111 in words is "one hundred twenty-two trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred eleven".