32312121221 has 24 divisors (see below), whose sum is σ = 37273284864. Its totient is φ = 27881262720.

The previous prime is 32312121217. The next prime is 32312121223. The reversal of 32312121221 is 12212121323.

It is not a de Polignac number, because 32312121221 - 2² = 32312121217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32312121193 and 32312121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32312121223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105326 + ... + 275168.

It is an arithmetic number, because the mean of its divisors is an integer number (1553053536).

Almost surely, 2^32312121221 is an apocalyptic number.

32312121221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

32312121221 is a deficient number, since it is larger than the sum of its proper divisors (4961163643).

32312121221 is a wasteful number, since it uses less digits than its factorization.

32312121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169929 (or 169910 counting only the distinct ones).

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

Adding to 32312121221 its reverse (12212121323), we get a palindrome (44524242544).

The spelling of 32312121221 in words is "thirty-two billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".