20113132321 has 2 divisors, whose sum is σ = 20113132322. Its totient is φ = 20113132320.

The previous prime is 20113132307. The next prime is 20113132343. The reversal of 20113132321 is 12323131102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16445497600 + 3667634721 = 128240^2 + 60561^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113132321 - 2²³ = 20104743713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20113136321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056566160 + 10056566161.

It is an arithmetic number, because the mean of its divisors is an integer number (10056566161).

Almost surely, 2^20113132321 is an apocalyptic number.

It is an amenable number.

20113132321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113132321 is an equidigital number, since it uses as much as digits as its factorization.

20113132321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20113132321 its reverse (12323131102), we get a palindrome (32436263423).

The spelling of 20113132321 in words is "twenty billion, one hundred thirteen million, one hundred thirty-two thousand, three hundred twenty-one".