2102210221212 has 36 divisors (see below), whose sum is σ = 5497158914520. Its totient is φ = 676573404192.

The previous prime is 2102210221201. The next prime is 2102210221213. The reversal of 2102210221212 is 2121220122012.

It is a happy number.

2102210221212 is a `hidden beast` number, since 2 + 10 + 221 + 0 + 221 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102210221213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1006804618 + ... + 1006806705.

Almost surely, 2^{2102210221212} is an apocalyptic number.

It is an amenable number.

2102210221212 is an abundant number, since it is smaller than the sum of its proper divisors (3394948693308).

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

2102210221212 is a wasteful number, since it uses less digits than its factorization.

2102210221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013611362 (or 2013611357 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2102210221212 its reverse (2121220122012), we get a palindrome (4223430343224).

The spelling of 2102210221212 in words is "two trillion, one hundred two billion, two hundred ten million, two hundred twenty-one thousand, two hundred twelve".