222001000221 has 256 divisors, whose sum is σ = 419375480832. Its totient is φ = 100779033600.

The previous prime is 222001000219. The next prime is 222001000297. The reversal of 222001000221 is 122000100222.

It is not a de Polignac number, because 222001000221 - 2¹ = 222001000219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222001000197 and 222001000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001000621) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 844110136 + ... + 844110398.

It is an arithmetic number, because the mean of its divisors is an integer number (1638185472).

Almost surely, 2^222001000221 is an apocalyptic number.

222001000221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222001000221 is a deficient number, since it is larger than the sum of its proper divisors (197374480611).

222001000221 is a wasteful number, since it uses less digits than its factorization.

222001000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222001000221 its reverse (122000100222), we get a palindrome (344001100443).

The spelling of 222001000221 in words is "two hundred twenty-two billion, one million, two hundred twenty-one", and thus it is an aban number.