1201313220321 has 4 divisors (see below), whose sum is σ = 1601750960432. Its totient is φ = 800875480212.

The previous prime is 1201313220313. The next prime is 1201313220361. The reversal of 1201313220321 is 1230223131021.

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 1201313220321 - 2³ = 1201313220313 is a prime.

It is a super-2 number, since 2×1201313220321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201313220361) 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, 200218870051 + ... + 200218870056.

It is an arithmetic number, because the mean of its divisors is an integer number (400437740108).

Almost surely, 2^{1201313220321} is an apocalyptic number.

It is an amenable number.

1201313220321 is a deficient number, since it is larger than the sum of its proper divisors (400437740111).

1201313220321 is an equidigital number, since it uses as much as digits as its factorization.

1201313220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400437740110.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1201313220321 its reverse (1230223131021), we get a palindrome (2431536351342).

The spelling of 1201313220321 in words is "one trillion, two hundred one billion, three hundred thirteen million, two hundred twenty thousand, three hundred twenty-one".