221020100220201 has 16 divisors (see below), whose sum is σ = 298895757143040. Its totient is φ = 145246306138640.

The previous prime is 221020100220197. The next prime is 221020100220203. The reversal of 221020100220201 is 102022001020122.

It is a cyclic number.

It is not a de Polignac number, because 221020100220201 - 2² = 221020100220197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221020100220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88484031 + ... + 90947588.

It is an arithmetic number, because the mean of its divisors is an integer number (18680984821440).

Almost surely, 2^{221020100220201} is an apocalyptic number.

It is an amenable number.

221020100220201 is a deficient number, since it is larger than the sum of its proper divisors (77875656922839).

221020100220201 is a wasteful number, since it uses less digits than its factorization.

221020100220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179437476.

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

Adding to 221020100220201 its reverse (102022001020122), we get a palindrome (323042101240323).

The spelling of 221020100220201 in words is "two hundred twenty-one trillion, twenty billion, one hundred million, two hundred twenty thousand, two hundred one".