2112121222 has 4 divisors (see below), whose sum is σ = 3168181836. Its totient is φ = 1056060610.

The previous prime is 2112121213. The next prime is 2112121229. The reversal of 2112121222 is 2221212112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2112121222² = 8922112112845546568, which contains 22 as substring.

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 = 2112121196 and 2112121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112121229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528030304 + ... + 528030307.

It is an arithmetic number, because the mean of its divisors is an integer number (792045459).

Almost surely, 2^2112121222 is an apocalyptic number.

2112121222 is a deficient number, since it is larger than the sum of its proper divisors (1056060614).

2112121222 is a wasteful number, since it uses less digits than its factorization.

2112121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056060613.

The product of its digits is 64, while the sum is 16.

The square root of 2112121222 is about 45957.8200309806. The cubic root of 2112121222 is about 1283.0382784811.

Adding to 2112121222 its reverse (2221212112), we get a palindrome (4333333334).

The spelling of 2112121222 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".