221222001001 has 16 divisors (see below), whose sum is σ = 229890624768. Its totient is φ = 212711385600.

The previous prime is 221222000983. The next prime is 221222001017. The reversal of 221222001001 is 100100222122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221222001001 - 2⁷ = 221222000873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221222001061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9352876 + ... + 9376498.

It is an arithmetic number, because the mean of its divisors is an integer number (14368164048).

Almost surely, 2^221222001001 is an apocalyptic number.

It is an amenable number.

221222001001 is a deficient number, since it is larger than the sum of its proper divisors (8668623767).

221222001001 is a wasteful number, since it uses less digits than its factorization.

221222001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26952.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221222001001 its reverse (100100222122), we get a palindrome (321322223123).

The spelling of 221222001001 in words is "two hundred twenty-one billion, two hundred twenty-two million, one thousand, one".