12201201321 has 4 divisors (see below), whose sum is σ = 16268268432. Its totient is φ = 8134134212.

The previous prime is 12201201263. The next prime is 12201201323. The reversal of 12201201321 is 12310210221.

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 12201201321 - 2²⁹ = 11664330409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12201201321.

It is not an unprimeable number, because it can be changed into a prime (12201201323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033533551 + ... + 2033533556.

It is an arithmetic number, because the mean of its divisors is an integer number (4067067108).

Almost surely, 2^12201201321 is an apocalyptic number.

It is an amenable number.

12201201321 is a deficient number, since it is larger than the sum of its proper divisors (4067067111).

12201201321 is an equidigital number, since it uses as much as digits as its factorization.

12201201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067067110.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12201201321 its reverse (12310210221), we get a palindrome (24511411542).

The spelling of 12201201321 in words is "twelve billion, two hundred one million, two hundred one thousand, three hundred twenty-one".