21032200221 has 8 divisors (see below), whose sum is σ = 28043615424. Its totient is φ = 14021125920.

The previous prime is 21032200159. The next prime is 21032200253. The reversal of 21032200221 is 12200223012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21032200221 - 2²¹ = 21030103069 is a prime.

It is a super-2 number, since 2×21032200221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21032200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032200261) 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 7 ways as a sum of consecutive naturals, for example, 157456 + ... + 258566.

It is an arithmetic number, because the mean of its divisors is an integer number (3505451928).

Almost surely, 2^21032200221 is an apocalyptic number.

It is an amenable number.

21032200221 is a deficient number, since it is larger than the sum of its proper divisors (7011415203).

21032200221 is a wasteful number, since it uses less digits than its factorization.

21032200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170451.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21032200221 its reverse (12200223012), we get a palindrome (33232423233).

The spelling of 21032200221 in words is "twenty-one billion, thirty-two million, two hundred thousand, two hundred twenty-one".