1131321320031 has 32 divisors (see below), whose sum is σ = 1831271016960. Its totient is φ = 606459764736.

The previous prime is 1131321320021. The next prime is 1131321320057. The reversal of 1131321320031 is 1300231231311.

It is a happy number.

It is not a de Polignac number, because 1131321320031 - 2¹¹ = 1131321317983 is a prime.

It is a super-2 number, since 2×1131321320031² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131321320021) 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 31 ways as a sum of consecutive naturals, for example, 5051586 + ... + 5270783.

It is an arithmetic number, because the mean of its divisors is an integer number (57227219280).

Almost surely, 2^{1131321320031} is an apocalyptic number.

1131321320031 is a deficient number, since it is larger than the sum of its proper divisors (699949696929).

1131321320031 is a wasteful number, since it uses less digits than its factorization.

1131321320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10322703.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1131321320031 its reverse (1300231231311), we get a palindrome (2431552551342).

The spelling of 1131321320031 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-one million, three hundred twenty thousand, thirty-one".