121112222112222 has 32 divisors (see below), whose sum is σ = 264247562597760. Its totient is φ = 36700296373920.

The previous prime is 121112222112221. The next prime is 121112222112241. The reversal of 121112222112222 is 222211222211121.

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 = 121112222112192 and 121112222112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112222112221) 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, 2917213 + ... + 15834600.

It is an arithmetic number, because the mean of its divisors is an integer number (8257736331180).

Almost surely, 2^{121112222112222} is an apocalyptic number.

121112222112222 is an abundant number, since it is smaller than the sum of its proper divisors (143135340485538).

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

121112222112222 is a wasteful number, since it uses less digits than its factorization.

121112222112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18849688.

The product of its digits is 512, while the sum is 24.

Adding to 121112222112222 its reverse (222211222211121), we get a palindrome (343323444323343).

The spelling of 121112222112222 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-two".