20120020321321 has 4 divisors (see below), whose sum is σ = 20769053234944. Its totient is φ = 19470987407700.

The previous prime is 20120020321309. The next prime is 20120020321337. The reversal of 20120020321321 is 12312302002102.

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 a cyclic number.

It is not a de Polignac number, because 20120020321321 - 2²⁷ = 20119886103593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120020321021) 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 3 ways as a sum of consecutive naturals, for example, 324516456765 + ... + 324516456826.

It is an arithmetic number, because the mean of its divisors is an integer number (5192263308736).

Almost surely, 2^{20120020321321} is an apocalyptic number.

It is an amenable number.

20120020321321 is a deficient number, since it is larger than the sum of its proper divisors (649032913623).

20120020321321 is an equidigital number, since it uses as much as digits as its factorization.

20120020321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649032913622.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20120020321321 its reverse (12312302002102), we get a palindrome (32432322323423).

The spelling of 20120020321321 in words is "twenty trillion, one hundred twenty billion, twenty million, three hundred twenty-one thousand, three hundred twenty-one".