221210211020202 has 32 divisors (see below), whose sum is σ = 494833731807360. Its totient is φ = 73248414242400.

The previous prime is 221210211020177. The next prime is 221210211020203. The reversal of 221210211020202 is 202020112012122.

It is a happy number.

221210211020202 is a `hidden beast` number, since 2 + 21 + 210 + 211 + 0 + 20 + 202 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (221210211020203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13564513003 + ... + 13564529310.

It is an arithmetic number, because the mean of its divisors is an integer number (15463554118980).

Almost surely, 2^{221210211020202} is an apocalyptic number.

221210211020202 is an abundant number, since it is smaller than the sum of its proper divisors (273623520787158).

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

221210211020202 is a wasteful number, since it uses less digits than its factorization.

221210211020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27129042475 (or 27129042469 counting only the distinct ones).

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

Adding to 221210211020202 its reverse (202020112012122), we get a palindrome (423230323032324).

The spelling of 221210211020202 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred eleven million, twenty thousand, two hundred two".