221002201212 has 24 divisors (see below), whose sum is σ = 555338864976. Its totient is φ = 68000677248.

The previous prime is 221002201207. The next prime is 221002201241. The reversal of 221002201212 is 212102200122.

It is a junction number, because it is equal to n+sod(n) for n = 221002201191 and 221002201200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708340233 + ... + 708340544.

It is an arithmetic number, because the mean of its divisors is an integer number (23139119374).

Almost surely, 2^221002201212 is an apocalyptic number.

It is an amenable number.

221002201212 is an abundant number, since it is smaller than the sum of its proper divisors (334336663764).

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

221002201212 is a wasteful number, since it uses less digits than its factorization.

221002201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416680797 (or 1416680795 counting only the distinct ones).

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

Adding to 221002201212 its reverse (212102200122), we get a palindrome (433104401334).

The spelling of 221002201212 in words is "two hundred twenty-one billion, two million, two hundred one thousand, two hundred twelve".