221001212212222 has 8 divisors (see below), whose sum is σ = 357001958189016. Its totient is φ = 102000559482552.

The previous prime is 221001212212189. The next prime is 221001212212267. The reversal of 221001212212222 is 222212212100122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221001212212193 and 221001212212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250023311748 + ... + 4250023311799.

It is an arithmetic number, because the mean of its divisors is an integer number (44625244773627).

Almost surely, 2^{221001212212222} is an apocalyptic number.

221001212212222 is a deficient number, since it is larger than the sum of its proper divisors (136000745976794).

221001212212222 is a wasteful number, since it uses less digits than its factorization.

221001212212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500046623562.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221001212212222 its reverse (222212212100122), we get a palindrome (443213424312344).

The spelling of 221001212212222 in words is "two hundred twenty-one trillion, one billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-two".