1311320021441 has 16 divisors (see below), whose sum is σ = 1352030429376. Its totient is φ = 1271292325056.

The previous prime is 1311320021419. The next prime is 1311320021447. The reversal of 1311320021441 is 1441200231131.

It is a cyclic number.

It is not a de Polignac number, because 1311320021441 - 2¹⁴ = 1311320005057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311320021447) 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 15 ways as a sum of consecutive naturals, for example, 1055846 + ... + 1933248.

It is an arithmetic number, because the mean of its divisors is an integer number (84501901836).

Almost surely, 2^{1311320021441} is an apocalyptic number.

It is an amenable number.

1311320021441 is a deficient number, since it is larger than the sum of its proper divisors (40710407935).

1311320021441 is a wasteful number, since it uses less digits than its factorization.

1311320021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877792.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1311320021441 its reverse (1441200231131), we get a palindrome (2752520252572).

The spelling of 1311320021441 in words is "one trillion, three hundred eleven billion, three hundred twenty million, twenty-one thousand, four hundred forty-one".