2221202121210 has 256 divisors, whose sum is σ = 6319137162240. Its totient is φ = 560945088000.

The previous prime is 2221202121121. The next prime is 2221202121241. The reversal of 2221202121210 is 121212021222.

It is a happy number.

2221202121210 is a `hidden beast` number, since 2 + 221 + 20 + 212 + 1 + 210 = 666.

2221202121210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50782150 + ... + 50825870.

It is an arithmetic number, because the mean of its divisors is an integer number (24684129540).

Almost surely, 2^{2221202121210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221202121210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3159568581120).

2221202121210 is an abundant number, since it is smaller than the sum of its proper divisors (4097935041030).

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

2221202121210 is a wasteful number, since it uses less digits than its factorization.

2221202121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43873 (or 43855 counting only the distinct ones).

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

Adding to 2221202121210 its reverse (121212021222), we get a palindrome (2342414142432).

It can be divided in two parts, 22212021212 and 10, that added together give a palindrome (22212021222).

The spelling of 2221202121210 in words is "two trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred ten".