32312220021 has 24 divisors (see below), whose sum is σ = 50175016320. Its totient is φ = 19973506176.

The previous prime is 32312220001. The next prime is 32312220029. The reversal of 32312220021 is 12002221323.

32312220021 is a `hidden beast` number, since 323 + 122 + 200 + 21 = 666.

It is not a de Polignac number, because 32312220021 - 2¹⁵ = 32312187253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32312219976 and 32312220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32312220029) 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, 2002180 + ... + 2018253.

It is an arithmetic number, because the mean of its divisors is an integer number (2090625680).

Almost surely, 2^32312220021 is an apocalyptic number.

It is an amenable number.

32312220021 is a deficient number, since it is larger than the sum of its proper divisors (17862796299).

32312220021 is a wasteful number, since it uses less digits than its factorization.

32312220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020505 (or 4020502 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 32312220021 its reverse (12002221323), we get a palindrome (44314441344).

The spelling of 32312220021 in words is "thirty-two billion, three hundred twelve million, two hundred twenty thousand, twenty-one".