221001020101 has 8 divisors (see below), whose sum is σ = 226149102080. Its totient is φ = 215853325632.

The previous prime is 221001020087. The next prime is 221001020117. The reversal of 221001020101 is 101020100122.

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 221001020101 - 2¹⁷ = 221000889029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001020171) 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, 1283356 + ... + 1445338.

It is an arithmetic number, because the mean of its divisors is an integer number (28268637760).

Almost surely, 2^221001020101 is an apocalyptic number.

It is an amenable number.

221001020101 is a deficient number, since it is larger than the sum of its proper divisors (5148081979).

221001020101 is a wasteful number, since it uses less digits than its factorization.

221001020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193755.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221001020101 its reverse (101020100122), we get a palindrome (322021120223).

The spelling of 221001020101 in words is "two hundred twenty-one billion, one million, twenty thousand, one hundred one".