2222121112 has 8 divisors (see below), whose sum is σ = 4166477100. Its totient is φ = 1111060552.

The previous prime is 2222121107. The next prime is 2222121113. The reversal of 2222121112 is 2111212222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2222121112² = 9875644472792233088, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222121113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138882562 + ... + 138882577.

Almost surely, 2^2222121112 is an apocalyptic number.

It is an amenable number.

2222121112 is a deficient number, since it is larger than the sum of its proper divisors (1944355988).

2222121112 is a wasteful number, since it uses less digits than its factorization.

2222121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277765145 (or 277765141 counting only the distinct ones).

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

The square root of 2222121112 is about 47139.3796310473. The cubic root of 2222121112 is about 1304.9360884326.

Adding to 2222121112 its reverse (2111212222), we get a palindrome (4333333334).

The spelling of 2222121112 in words is "two billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".