121111123122 has 48 divisors (see below), whose sum is σ = 301329119520. Its totient is φ = 34768742400.

The previous prime is 121111123097. The next prime is 121111123181. The reversal of 121111123122 is 221321111121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 121111123095 and 121111123104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16092879 + ... + 16100402.

It is an arithmetic number, because the mean of its divisors is an integer number (6277689990).

Almost surely, 2^121111123122 is an apocalyptic number.

121111123122 is an abundant number, since it is smaller than the sum of its proper divisors (180217996398).

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

121111123122 is a wasteful number, since it uses less digits than its factorization.

121111123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32193319 (or 32193316 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 121111123122 its reverse (221321111121), we get a palindrome (342432234243).

The spelling of 121111123122 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twenty-three thousand, one hundred twenty-two".