221001021101001 has 8 divisors (see below), whose sum is σ = 294676321542624. Its totient is φ = 147329867363360.

The previous prime is 221001021100997. The next prime is 221001021101027. The reversal of 221001021101001 is 100101120100122.

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 221001021101001 - 2² = 221001021100997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001021100001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036551636 + ... + 1036764821.

It is an arithmetic number, because the mean of its divisors is an integer number (36834540192828).

Almost surely, 2^{221001021101001} is an apocalyptic number.

It is an amenable number.

221001021101001 is a deficient number, since it is larger than the sum of its proper divisors (73675300441623).

221001021101001 is a wasteful number, since it uses less digits than its factorization.

221001021101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073351991.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221001021101001 its reverse (100101120100122), we get a palindrome (321102141201123).

The spelling of 221001021101001 in words is "two hundred twenty-one trillion, one billion, twenty-one million, one hundred one thousand, one".