20132021321 has 2 divisors, whose sum is σ = 20132021322. Its totient is φ = 20132021320.

The previous prime is 20132021317. The next prime is 20132021339. The reversal of 20132021321 is 12312023102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15543855625 + 4588165696 = 124675^2 + 67736^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132021321 - 2² = 20132021317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20132021321.

It is not a weakly prime, because it can be changed into another prime (20132029321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066010660 + 10066010661.

It is an arithmetic number, because the mean of its divisors is an integer number (10066010661).

Almost surely, 2^20132021321 is an apocalyptic number.

It is an amenable number.

20132021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132021321 is an equidigital number, since it uses as much as digits as its factorization.

20132021321 is an evil number, because the sum of its binary digits is even.

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

Adding to 20132021321 its reverse (12312023102), we get a palindrome (32444044423).

The spelling of 20132021321 in words is "twenty billion, one hundred thirty-two million, twenty-one thousand, three hundred twenty-one".