32121320021 has 32 divisors (see below), whose sum is σ = 39204000000. Its totient is φ = 25690678272.

The previous prime is 32121319999. The next prime is 32121320039. The reversal of 32121320021 is 12002312123.

It is not a de Polignac number, because 32121320021 - 2¹⁰ = 32121318997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32121320041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11683355 + ... + 11686103.

It is an arithmetic number, because the mean of its divisors is an integer number (1225125000).

Almost surely, 2^32121320021 is an apocalyptic number.

It is an amenable number.

32121320021 is a deficient number, since it is larger than the sum of its proper divisors (7082679979).

32121320021 is a wasteful number, since it uses less digits than its factorization.

32121320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 32121320021 its reverse (12002312123), we get a palindrome (44123632144).

The spelling of 32121320021 in words is "thirty-two billion, one hundred twenty-one million, three hundred twenty thousand, twenty-one".