221001021201 has 16 divisors (see below), whose sum is σ = 313067620800. Its totient is φ = 138408838848.

The previous prime is 221001021193. The next prime is 221001021203. The reversal of 221001021201 is 102120100122.

It is not a de Polignac number, because 221001021201 - 2³ = 221001021193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001021203) 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 15 ways as a sum of consecutive naturals, for example, 34324371 + ... + 34330808.

It is an arithmetic number, because the mean of its divisors is an integer number (19566726300).

Almost surely, 2^221001021201 is an apocalyptic number.

It is an amenable number.

221001021201 is a deficient number, since it is larger than the sum of its proper divisors (92066599599).

221001021201 is a wasteful number, since it uses less digits than its factorization.

221001021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68655248.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221001021201 its reverse (102120100122), we get a palindrome (323121121323).

The spelling of 221001021201 in words is "two hundred twenty-one billion, one million, twenty-one thousand, two hundred one".