32121100221 has 8 divisors (see below), whose sum is σ = 48946438464. Its totient is φ = 18354914400.

The previous prime is 32121100189. The next prime is 32121100241. The reversal of 32121100221 is 12200112123.

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

It is not a de Polignac number, because 32121100221 - 2⁵ = 32121100189 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 32121100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32121100241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764788080 + ... + 764788121.

It is an arithmetic number, because the mean of its divisors is an integer number (6118304808).

Almost surely, 2^32121100221 is an apocalyptic number.

It is an amenable number.

32121100221 is a deficient number, since it is larger than the sum of its proper divisors (16825338243).

32121100221 is a wasteful number, since it uses less digits than its factorization.

32121100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529576211.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 32121100221 its reverse (12200112123), we get a palindrome (44321212344).

The spelling of 32121100221 in words is "thirty-two billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".