20121132323321 has 2 divisors, whose sum is σ = 20121132323322. Its totient is φ = 20121132323320.

The previous prime is 20121132323297. The next prime is 20121132323339. The reversal of 20121132323321 is 12332323112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11507963890921 + 8613168432400 = 3392339^2 + 2934820^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121132323321 - 2¹⁰ = 20121132322297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121132320321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060566161660 + 10060566161661.

It is an arithmetic number, because the mean of its divisors is an integer number (10060566161661).

Almost surely, 2^{20121132323321} is an apocalyptic number.

It is an amenable number.

20121132323321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121132323321 is an equidigital number, since it uses as much as digits as its factorization.

20121132323321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20121132323321 its reverse (12332323112102), we get a palindrome (32453455435423).

The spelling of 20121132323321 in words is "twenty trillion, one hundred twenty-one billion, one hundred thirty-two million, three hundred twenty-three thousand, three hundred twenty-one".