111211211122122 has 64 divisors (see below), whose sum is σ = 229387111317504. Its totient is φ = 35918063124480.

The previous prime is 111211211122013. The next prime is 111211211122139. The reversal of 111211211122122 is 221221112112111.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204152472 + ... + 204696492.

It is an arithmetic number, because the mean of its divisors is an integer number (3584173614336).

Almost surely, 2^{111211211122122} is an apocalyptic number.

111211211122122 is an abundant number, since it is smaller than the sum of its proper divisors (118175900195382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111211211122122 is a wasteful number, since it uses less digits than its factorization.

111211211122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547903.

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

Adding to 111211211122122 its reverse (221221112112111), we get a palindrome (332432323234233).

The spelling of 111211211122122 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-two".