221000220212 has 12 divisors (see below), whose sum is σ = 388126723236. Its totient is φ = 110106870720.

The previous prime is 221000220211. The next prime is 221000220239. The reversal of 221000220212 is 212022000122.

It can be written as a sum of positive squares in 2 ways, for example, as 74154914596 + 146845305616 = 272314^2 + 383204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000220211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98308583 + ... + 98310830.

It is an arithmetic number, because the mean of its divisors is an integer number (32343893603).

Almost surely, 2^221000220212 is an apocalyptic number.

It is an amenable number.

221000220212 is a deficient number, since it is larger than the sum of its proper divisors (167126503024).

221000220212 is a wasteful number, since it uses less digits than its factorization.

221000220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196619698 (or 196619696 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221000220212 its reverse (212022000122), we get a palindrome (433022220334).

The spelling of 221000220212 in words is "two hundred twenty-one billion, two hundred twenty thousand, two hundred twelve".