220002001221 has 32 divisors (see below), whose sum is σ = 307874856960. Its totient is φ = 139576516416.

The previous prime is 220002001211. The next prime is 220002001237. The reversal of 220002001221 is 122100200022.

It is not a de Polignac number, because 220002001221 - 2⁵ = 220002001189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220002001197 and 220002001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220002001211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8475100 + ... + 8501018.

It is an arithmetic number, because the mean of its divisors is an integer number (9621089280).

Almost surely, 2^220002001221 is an apocalyptic number.

It is an amenable number.

220002001221 is a deficient number, since it is larger than the sum of its proper divisors (87872855739).

220002001221 is a wasteful number, since it uses less digits than its factorization.

220002001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27633.

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

Adding to 220002001221 its reverse (122100200022), we get a palindrome (342102201243).

The spelling of 220002001221 in words is "two hundred twenty billion, two million, one thousand, two hundred twenty-one".