32121110221 has 4 divisors (see below), whose sum is σ = 32207226172. Its totient is φ = 32034994272.

The previous prime is 32121110191. The next prime is 32121110243. The reversal of 32121110221 is 12201112123.

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 13909607721 + 18211502500 = 117939^2 + 134950^2 .

It is a cyclic number.

It is not a de Polignac number, because 32121110221 - 2¹⁵ = 32121077453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32121110195 and 32121110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32121110251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43057416 + ... + 43058161.

It is an arithmetic number, because the mean of its divisors is an integer number (8051806543).

Almost surely, 2^32121110221 is an apocalyptic number.

It is an amenable number.

32121110221 is a deficient number, since it is larger than the sum of its proper divisors (86115951).

32121110221 is an equidigital number, since it uses as much as digits as its factorization.

32121110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86115950.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 32121110221 its reverse (12201112123), we get a palindrome (44322222344).

The spelling of 32121110221 in words is "thirty-two billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".