2102221212 has 192 divisors, whose sum is σ = 6243901440. Its totient is φ = 535797504.

The previous prime is 2102221157. The next prime is 2102221213. The reversal of 2102221212 is 2121222012.

It is a junction number, because it is equal to n+sod(n) for n = 2102221191 and 2102221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102221213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4316433 + ... + 4316919.

It is an arithmetic number, because the mean of its divisors is an integer number (32520320).

Almost surely, 2^2102221212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3121950720).

2102221212 is an abundant number, since it is smaller than the sum of its proper divisors (4141680228).

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

2102221212 is a wasteful number, since it uses less digits than its factorization.

2102221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2102221212 is about 45849.9859541963. The cubic root of 2102221212 is about 1281.0305039596.

Adding to 2102221212 its reverse (2121222012), we get a palindrome (4223443224).

The spelling of 2102221212 in words is "two billion, one hundred two million, two hundred twenty-one thousand, two hundred twelve".