2121010100112 has 40 divisors (see below), whose sum is σ = 5479348813120. Its totient is φ = 706993983360.

The previous prime is 2121010100081. The next prime is 2121010100117. The reversal of 2121010100112 is 2110010101212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (2121010100117) 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 7 ways as a sum of consecutive naturals, for example, 4013037 + ... + 4510707.

It is an arithmetic number, because the mean of its divisors is an integer number (136983720328).

Almost surely, 2^{2121010100112} is an apocalyptic number.

It is an amenable number.

2121010100112 is an abundant number, since it is smaller than the sum of its proper divisors (3358338713008).

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

2121010100112 is a wasteful number, since it uses less digits than its factorization.

2121010100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586471 (or 586465 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2121010100112 its reverse (2110010101212), we get a palindrome (4231020201324).

The spelling of 2121010100112 in words is "two trillion, one hundred twenty-one billion, ten million, one hundred thousand, one hundred twelve".