1301121220321 has 4 divisors (see below), whose sum is σ = 1401207468052. Its totient is φ = 1201034972592.

The previous prime is 1301121220309. The next prime is 1301121220363. The reversal of 1301121220321 is 1230221211031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 418816065600 + 882305154721 = 647160^2 + 939311^2 .

It is not a de Polignac number, because 1301121220321 - 2³¹ = 1298973736673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1301121224321) 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, 50043123846 + ... + 50043123871.

It is an arithmetic number, because the mean of its divisors is an integer number (350301867013).

Almost surely, 2^{1301121220321} is an apocalyptic number.

It is an amenable number.

1301121220321 is a deficient number, since it is larger than the sum of its proper divisors (100086247731).

1301121220321 is a wasteful number, since it uses less digits than its factorization.

1301121220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100086247730.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1301121220321 its reverse (1230221211031), we get a palindrome (2531342431352).

The spelling of 1301121220321 in words is "one trillion, three hundred one billion, one hundred twenty-one million, two hundred twenty thousand, three hundred twenty-one".