221022221001 has 8 divisors (see below), whose sum is σ = 299691147360. Its totient is φ = 144850720992.

The previous prime is 221022220831. The next prime is 221022221027. The reversal of 221022221001 is 100122220122.

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

It is a de Polignac number, because none of the positive numbers 2^k-221022221001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221022221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624356380 + ... + 624356733.

It is an arithmetic number, because the mean of its divisors is an integer number (37461393420).

Almost surely, 2^221022221001 is an apocalyptic number.

It is an amenable number.

221022221001 is a deficient number, since it is larger than the sum of its proper divisors (78668926359).

221022221001 is a wasteful number, since it uses less digits than its factorization.

221022221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248713175.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221022221001 its reverse (100122220122), we get a palindrome (321144441123).

The spelling of 221022221001 in words is "two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one".