221000212021202 has 16 divisors (see below), whose sum is σ = 336238049096280. Its totient is φ = 108922633771392.

The previous prime is 221000212021187. The next prime is 221000212021217. The reversal of 221000212021202 is 202120212000122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221000212021187) and next prime (221000212021217).

It can be written as a sum of positive squares in 4 ways, for example, as 180594115437961 + 40406096583241 = 13438531^2 + 6356579^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442611833 + ... + 443110860.

Almost surely, 2^{221000212021202} is an apocalyptic number.

221000212021202 is a deficient number, since it is larger than the sum of its proper divisors (115237837075078).

221000212021202 is a wasteful number, since it uses less digits than its factorization.

221000212021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885724477.

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

Adding to 221000212021202 its reverse (202120212000122), we get a palindrome (423120424021324).

The spelling of 221000212021202 in words is "two hundred twenty-one trillion, two hundred twelve million, twenty-one thousand, two hundred two".