2121212112112 has 80 divisors (see below), whose sum is σ = 4142358934560. Its totient is φ = 1052260966400.

The previous prime is 2121212112073. The next prime is 2121212112119. The reversal of 2121212112112 is 2112112121212.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2121212112112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121212112119) 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, 1365879528 + ... + 1365881080.

It is an arithmetic number, because the mean of its divisors is an integer number (51779486682).

Almost surely, 2^{2121212112112} is an apocalyptic number.

It is an amenable number.

2121212112112 is a deficient number, since it is larger than the sum of its proper divisors (2021146822448).

2121212112112 is a wasteful number, since it uses less digits than its factorization.

2121212112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 2956 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 2121212112112 its reverse (2112112121212), we get a palindrome (4233324233324).

The spelling of 2121212112112 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred twelve".