1131031311373 has 2 divisors, whose sum is σ = 1131031311374. Its totient is φ = 1131031311372.

The previous prime is 1131031311349. The next prime is 1131031311391. The reversal of 1131031311373 is 3731131301311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756973081764 + 374058229609 = 870042^2 + 611603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131031311373 - 2²⁹ = 1130494440461 is a prime.

It is a super-3 number, since 3×1131031311373³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131031314373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565515655686 + 565515655687.

It is an arithmetic number, because the mean of its divisors is an integer number (565515655687).

Almost surely, 2^{1131031311373} is an apocalyptic number.

It is an amenable number.

1131031311373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131031311373 is an equidigital number, since it uses as much as digits as its factorization.

1131031311373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 28.

Adding to 1131031311373 its reverse (3731131301311), we get a palindrome (4862162612684).

The spelling of 1131031311373 in words is "one trillion, one hundred thirty-one billion, thirty-one million, three hundred eleven thousand, three hundred seventy-three".