1321320121401 has 8 divisors (see below), whose sum is σ = 2013440185024. Its totient is φ = 755040069360.

The previous prime is 1321320121397. The next prime is 1321320121409. The reversal of 1321320121401 is 1041210231231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321320121401 - 2² = 1321320121397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 62920005781 = 1321320121401 / (1 + 3 + 2 + 1 + 3 + 2 + 0 + 1 + 2 + 1 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321320121409) 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 7 ways as a sum of consecutive naturals, for example, 31460002870 + ... + 31460002911.

It is an arithmetic number, because the mean of its divisors is an integer number (251680023128).

Almost surely, 2^{1321320121401} is an apocalyptic number.

It is an amenable number.

1321320121401 is a deficient number, since it is larger than the sum of its proper divisors (692120063623).

1321320121401 is an equidigital number, since it uses as much as digits as its factorization.

1321320121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62920005791.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1321320121401 its reverse (1041210231231), we get a palindrome (2362530352632).

The spelling of 1321320121401 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, one hundred twenty-one thousand, four hundred one".