221000120202212 has 18 divisors (see below), whose sum is σ = 418788689319378. Its totient is φ = 102000055477632.

The previous prime is 221000120202179. The next prime is 221000120202247. The reversal of 221000120202212 is 212202021000122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15701200200676 + 205298920001536 = 3962474^2 + 14328256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163461626693 + ... + 163461628044.

It is an arithmetic number, because the mean of its divisors is an integer number (23266038295521).

Almost surely, 2^{221000120202212} is an apocalyptic number.

It is an amenable number.

221000120202212 is a deficient number, since it is larger than the sum of its proper divisors (197788569117166).

221000120202212 is a wasteful number, since it uses less digits than its factorization.

221000120202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326923254767 (or 326923254752 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221000120202212 its reverse (212202021000122), we get a palindrome (433202141202334).

The spelling of 221000120202212 in words is "two hundred twenty-one trillion, one hundred twenty million, two hundred two thousand, two hundred twelve".