221332331201 has 4 divisors (see below), whose sum is σ = 222611709012. Its totient is φ = 220052953392.

The previous prime is 221332331183. The next prime is 221332331203. The reversal of 221332331201 is 102133233122.

221332331201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149602636225 + 71729694976 = 386785^2 + 267824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221332331201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221332331203) 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 3 ways as a sum of consecutive naturals, for example, 639688646 + ... + 639688991.

It is an arithmetic number, because the mean of its divisors is an integer number (55652927253).

Almost surely, 2^221332331201 is an apocalyptic number.

It is an amenable number.

221332331201 is a deficient number, since it is larger than the sum of its proper divisors (1279377811).

221332331201 is a wasteful number, since it uses less digits than its factorization.

221332331201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279377810.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 221332331201 its reverse (102133233122), we get a palindrome (323465564323).

The spelling of 221332331201 in words is "two hundred twenty-one billion, three hundred thirty-two million, three hundred thirty-one thousand, two hundred one".