221021221002201 has 72 divisors (see below), whose sum is σ = 339610972344384. Its totient is φ = 138407829114240.

The previous prime is 221021221002193. The next prime is 221021221002217. The reversal of 221021221002201 is 102200122120122.

It is a happy number.

221021221002201 is a `hidden beast` number, since 2 + 21 + 0 + 212 + 210 + 0 + 220 + 1 = 666.

It is not a de Polignac number, because 221021221002201 - 2³ = 221021221002193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021221002601) 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 71 ways as a sum of consecutive naturals, for example, 3352481500 + ... + 3352547426.

Almost surely, 2^{221021221002201} is an apocalyptic number.

It is an amenable number.

221021221002201 is a deficient number, since it is larger than the sum of its proper divisors (118589751342183).

221021221002201 is a wasteful number, since it uses less digits than its factorization.

221021221002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77999 (or 77967 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221021221002201 its reverse (102200122120122), we get a palindrome (323221343122323).

The spelling of 221021221002201 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, two thousand, two hundred one".