20320132121 has 12 divisors (see below), whose sum is σ = 20744424432. Its totient is φ = 19904172504.

The previous prime is 20320132109. The next prime is 20320132153. The reversal of 20320132121 is 12123102302.

It is a de Polignac number, because none of the positive numbers 2^k-20320132121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20320132121.

It is not an unprimeable number, because it can be changed into a prime (20320132171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 974810 + ... + 995436.

It is an arithmetic number, because the mean of its divisors is an integer number (1728702036).

Almost surely, 2^20320132121 is an apocalyptic number.

It is an amenable number.

20320132121 is a deficient number, since it is larger than the sum of its proper divisors (424292311).

20320132121 is an equidigital number, since it uses as much as digits as its factorization.

20320132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21028 (or 20969 counting only the distinct ones).

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

Adding to 20320132121 its reverse (12123102302), we get a palindrome (32443234423).

The spelling of 20320132121 in words is "twenty billion, three hundred twenty million, one hundred thirty-two thousand, one hundred twenty-one".