121222111112 has 16 divisors (see below), whose sum is σ = 228008470860. Its totient is φ = 60419852224.

The previous prime is 121222111097. The next prime is 121222111117. The reversal of 121222111112 is 211111222121.

It can be written as a sum of positive squares in 2 ways, for example, as 106671479236 + 14550631876 = 326606^2 + 120626^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121222111117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23897723 + ... + 23902794.

Almost surely, 2^121222111112 is an apocalyptic number.

It is an amenable number.

121222111112 is a deficient number, since it is larger than the sum of its proper divisors (106786359748).

121222111112 is a wasteful number, since it uses less digits than its factorization.

121222111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47800840 (or 47800836 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 121222111112 its reverse (211111222121), we get a palindrome (332333333233).

The spelling of 121222111112 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twelve".