221021001222212 has 24 divisors (see below), whose sum is σ = 388232398310400. Its totient is φ = 110097475308576.

The previous prime is 221021001222199. The next prime is 221021001222313. The reversal of 221021001222212 is 212222100120122.

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, 52347773 + ... + 56412155.

It is an arithmetic number, because the mean of its divisors is an integer number (16176349929600).

Almost surely, 2^{221021001222212} is an apocalyptic number.

It is an amenable number.

221021001222212 is a deficient number, since it is larger than the sum of its proper divisors (167211397088188).

221021001222212 is a wasteful number, since it uses less digits than its factorization.

221021001222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115195 (or 4115193 counting only the distinct ones).

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

Adding to 221021001222212 its reverse (212222100120122), we get a palindrome (433243101342334).

The spelling of 221021001222212 in words is "two hundred twenty-one trillion, twenty-one billion, one million, two hundred twenty-two thousand, two hundred twelve".