221122221001 has 8 divisors (see below), whose sum is σ = 249005668608. Its totient is φ = 194535678000.

The previous prime is 221122220987. The next prime is 221122221049. The reversal of 221122221001 is 100122221122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221122221001 - 2¹⁹ = 221121696713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221122221071) 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, 324225790 + ... + 324226471.

It is an arithmetic number, because the mean of its divisors is an integer number (31125708576).

Almost surely, 2^221122221001 is an apocalyptic number.

It is an amenable number.

221122221001 is a deficient number, since it is larger than the sum of its proper divisors (27883447607).

221122221001 is a wasteful number, since it uses less digits than its factorization.

221122221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648452303.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221122221001 its reverse (100122221122), we get a palindrome (321244442123).

The spelling of 221122221001 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, one".