1311421121763 has 16 divisors (see below), whose sum is σ = 1769293500576. Its totient is φ = 863942353920.

The previous prime is 1311421121729. The next prime is 1311421121771. The reversal of 1311421121763 is 3671211241131.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1311421121763 is a prime.

It is a super-2 number, since 2×1311421121763² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311421121783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3260668 + ... + 3640713.

It is an arithmetic number, because the mean of its divisors is an integer number (110580843786).

Almost surely, 2^{1311421121763} is an apocalyptic number.

1311421121763 is a deficient number, since it is larger than the sum of its proper divisors (457872378813).

1311421121763 is an equidigital number, since it uses as much as digits as its factorization.

1311421121763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6902134.

The product of its digits is 6048, while the sum is 33.

Adding to 1311421121763 its reverse (3671211241131), we get a palindrome (4982632362894).

The spelling of 1311421121763 in words is "one trillion, three hundred eleven billion, four hundred twenty-one million, one hundred twenty-one thousand, seven hundred sixty-three".