2102110021212 has 48 divisors (see below), whose sum is σ = 4981632241152. Its totient is φ = 689759642880.

The previous prime is 2102110021177. The next prime is 2102110021213. The reversal of 2102110021212 is 2121200112012.

It is a junction number, because it is equal to n+sod(n) for n = 2102110021191 and 2102110021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102110021213) 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 15 ways as a sum of consecutive naturals, for example, 225412 + ... + 2062772.

It is an arithmetic number, because the mean of its divisors is an integer number (103784005024).

Almost surely, 2^{2102110021212} is an apocalyptic number.

It is an amenable number.

2102110021212 is an abundant number, since it is smaller than the sum of its proper divisors (2879522219940).

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

2102110021212 is a wasteful number, since it uses less digits than its factorization.

2102110021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838858 (or 1838856 counting only the distinct ones).

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

Adding to 2102110021212 its reverse (2121200112012), we get a palindrome (4223310133224).

The spelling of 2102110021212 in words is "two trillion, one hundred two billion, one hundred ten million, twenty-one thousand, two hundred twelve".