32121231221 has 8 divisors (see below), whose sum is σ = 32729249688. Its totient is φ = 31515840000.

The previous prime is 32121231203. The next prime is 32121231229. The reversal of 32121231221 is 12213212123.

It can be written as a sum of positive squares in 4 ways, for example, as 5516032900 + 26605198321 = 74270^2 + 163111^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 32121231221 - 2¹⁴ = 32121214837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32121231193 and 32121231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32121231229) 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, 632120 + ... + 681041.

It is an arithmetic number, because the mean of its divisors is an integer number (4091156211).

Almost surely, 2^32121231221 is an apocalyptic number.

It is an amenable number.

32121231221 is a deficient number, since it is larger than the sum of its proper divisors (608018467).

32121231221 is a wasteful number, since it uses less digits than its factorization.

32121231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313623.

The product of its digits is 288, while the sum is 20.

Adding to 32121231221 its reverse (12213212123), we get a palindrome (44334443344).

The spelling of 32121231221 in words is "thirty-two billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-one".