2121222121112 has 64 divisors (see below), whose sum is σ = 4175262936000. Its totient is φ = 1008378241024.

The previous prime is 2121222121111. The next prime is 2121222121121. The reversal of 2121222121112 is 2111212221212.

It is a super-2 number, since 2×2121222121112² (a number of 25 digits) 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 (2121222121111) 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, 201459464 + ... + 201469992.

It is an arithmetic number, because the mean of its divisors is an integer number (65238483375).

Almost surely, 2^{2121222121112} is an apocalyptic number.

It is an amenable number.

2121222121112 is a deficient number, since it is larger than the sum of its proper divisors (2054040814888).

2121222121112 is a wasteful number, since it uses less digits than its factorization.

2121222121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17060 (or 17056 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 2121222121112 its reverse (2111212221212), we get a palindrome (4232434342324).

The spelling of 2121222121112 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".