221002202112212 has 12 divisors (see below), whose sum is σ = 386754660864180. Its totient is φ = 110500870436736.

The previous prime is 221002202112137. The next prime is 221002202112217. The reversal of 221002202112212 is 212211202200122.

It can be written as a sum of positive squares in 2 ways, for example, as 18506911465156 + 202495290647056 = 4301966^2 + 14230084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002202112217) 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, 55489637 + ... + 59338892.

It is an arithmetic number, because the mean of its divisors is an integer number (32229555072015).

Almost surely, 2^{221002202112212} is an apocalyptic number.

It is an amenable number.

221002202112212 is a deficient number, since it is larger than the sum of its proper divisors (165752458751968).

221002202112212 is a wasteful number, since it uses less digits than its factorization.

221002202112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115309690 (or 115309688 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221002202112212 its reverse (212211202200122), we get a palindrome (433213404312334).

The spelling of 221002202112212 in words is "two hundred twenty-one trillion, two billion, two hundred two million, one hundred twelve thousand, two hundred twelve".