221020001100221 has 8 divisors (see below), whose sum is σ = 234410378930304. Its totient is φ = 207944690983920.

The previous prime is 221020001100209. The next prime is 221020001100263. The reversal of 221020001100221 is 122001100020122.

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

It is not a de Polignac number, because 221020001100221 - 2¹⁴ = 221020001083837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221020001100196 and 221020001100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020001105221) 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, 78766927001 + ... + 78766929806.

It is an arithmetic number, because the mean of its divisors is an integer number (29301297366288).

Almost surely, 2^{221020001100221} is an apocalyptic number.

It is an amenable number.

221020001100221 is a deficient number, since it is larger than the sum of its proper divisors (13390377830083).

221020001100221 is a wasteful number, since it uses less digits than its factorization.

221020001100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157533856891.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020001100221 its reverse (122001100020122), we get a palindrome (343021101120343).

The spelling of 221020001100221 in words is "two hundred twenty-one trillion, twenty billion, one million, one hundred thousand, two hundred twenty-one".