1311320453121 has 24 divisors (see below), whose sum is σ = 2165043701184. Its totient is φ = 749213742240.

The previous prime is 1311320453117. The next prime is 1311320453137. The reversal of 1311320453121 is 1213540231131.

1311320453121 is a `hidden beast` number, since 1 + 311 + 32 + 0 + 4 + 5 + 312 + 1 = 666.

It is not a de Polignac number, because 1311320453121 - 2² = 1311320453117 is a prime.

It is a super-2 number, since 2×1311320453121² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311320453161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1133886 + ... + 1976951.

It is an arithmetic number, because the mean of its divisors is an integer number (90210154216).

Almost surely, 2^{1311320453121} is an apocalyptic number.

It is an amenable number.

1311320453121 is a deficient number, since it is larger than the sum of its proper divisors (853723248063).

1311320453121 is a wasteful number, since it uses less digits than its factorization.

1311320453121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117541 (or 3117538 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 1311320453121 its reverse (1213540231131), we get a palindrome (2524860684252).

The spelling of 1311320453121 in words is "one trillion, three hundred eleven billion, three hundred twenty million, four hundred fifty-three thousand, one hundred twenty-one".