20123200221321 has 4 divisors (see below), whose sum is σ = 26830933628432. Its totient is φ = 13415466814212.

The previous prime is 20123200221283. The next prime is 20123200221367. The reversal of 20123200221321 is 12312200232102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20123200221321 - 2¹⁰ = 20123200220297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123200221121) 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 3 ways as a sum of consecutive naturals, for example, 3353866703551 + ... + 3353866703556.

It is an arithmetic number, because the mean of its divisors is an integer number (6707733407108).

Almost surely, 2^{20123200221321} is an apocalyptic number.

It is an amenable number.

20123200221321 is a deficient number, since it is larger than the sum of its proper divisors (6707733407111).

20123200221321 is an equidigital number, since it uses as much as digits as its factorization.

20123200221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707733407110.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20123200221321 its reverse (12312200232102), we get a palindrome (32435400453423).

The spelling of 20123200221321 in words is "twenty trillion, one hundred twenty-three billion, two hundred million, two hundred twenty-one thousand, three hundred twenty-one".