111122212122122 has 24 divisors (see below), whose sum is σ = 177074555425740. Its totient is φ = 52289977233920.

The previous prime is 111122212122067. The next prime is 111122212122179. The reversal of 111122212122122 is 221221212221111.

It can be written as a sum of positive squares in 6 ways, for example, as 109776099353281 + 1346112768841 = 10477409^2 + 1160221^2 .

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 11 ways as a sum of consecutive naturals, for example, 5515004 + ... + 15895272.

Almost surely, 2^{111122212122122} is an apocalyptic number.

111122212122122 is a deficient number, since it is larger than the sum of its proper divisors (65952343303618).

111122212122122 is a wasteful number, since it uses less digits than its factorization.

111122212122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10398826 (or 10398809 counting only the distinct ones).

The product of its digits is 256, while the sum is 23.

Adding to 111122212122122 its reverse (221221212221111), we get a palindrome (332343424343233).

The spelling of 111122212122122 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-two".