122101111111 has 16 divisors (see below), whose sum is σ = 146979878400. Its totient is φ = 99088131168.

The previous prime is 122101111109. The next prime is 122101111129. The reversal of 122101111111 is 111111101221.

It is a cyclic number.

It is not a de Polignac number, because 122101111111 - 2¹ = 122101111109 is a prime.

It is a Duffinian number.

122101111111 is a modest number, since divided by 1111111 gives 12210 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 122101111091 and 122101111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122101111211) 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, 70051 + ... + 499108.

It is an arithmetic number, because the mean of its divisors is an integer number (9186242400).

Almost surely, 2^122101111111 is an apocalyptic number.

122101111111 is a deficient number, since it is larger than the sum of its proper divisors (24878767289).

122101111111 is a wasteful number, since it uses less digits than its factorization.

122101111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570798.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 122101111111 its reverse (111111101221), we get a palindrome (233212212332).

The spelling of 122101111111 in words is "one hundred twenty-two billion, one hundred one million, one hundred eleven thousand, one hundred eleven".