2121220110012 has 12 divisors (see below), whose sum is σ = 4949513590056. Its totient is φ = 707073370000.

The previous prime is 2121220109989. The next prime is 2121220110017. The reversal of 2121220110012 is 2100110221212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2121220109973 and 2121220110000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121220110017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88384171239 + ... + 88384171262.

It is an arithmetic number, because the mean of its divisors is an integer number (412459465838).

Almost surely, 2^{2121220110012} is an apocalyptic number.

It is an amenable number.

2121220110012 is an abundant number, since it is smaller than the sum of its proper divisors (2828293480044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121220110012 is a wasteful number, since it uses less digits than its factorization.

2121220110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176768342508 (or 176768342506 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121220110012 its reverse (2100110221212), we get a palindrome (4221330331224).

The spelling of 2121220110012 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, twelve".