221020220101201 has 16 divisors (see below), whose sum is σ = 224901837325440. Its totient is φ = 217146970759680.

The previous prime is 221020220101181. The next prime is 221020220101273. The reversal of 221020220101201 is 102101022020122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221020220101201 - 2¹¹ = 221020220099153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020220701201) 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, 811760650 + ... + 812032876.

It is an arithmetic number, because the mean of its divisors is an integer number (14056364832840).

Almost surely, 2^{221020220101201} is an apocalyptic number.

It is an amenable number.

221020220101201 is a deficient number, since it is larger than the sum of its proper divisors (3881617224239).

221020220101201 is a wasteful number, since it uses less digits than its factorization.

221020220101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287544.

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

Adding to 221020220101201 its reverse (102101022020122), we get a palindrome (323121242121323).

The spelling of 221020220101201 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty million, one hundred one thousand, two hundred one".