1131342431281 has 2 divisors, whose sum is σ = 1131342431282. Its totient is φ = 1131342431280.

The previous prime is 1131342431267. The next prime is 1131342431321. The reversal of 1131342431281 is 1821342431311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819732862881 + 311609568400 = 905391^2 + 558220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131342431281 - 2⁹ = 1131342430769 is a prime.

It is a super-2 number, since 2×1131342431281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131342431581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565671215640 + 565671215641.

It is an arithmetic number, because the mean of its divisors is an integer number (565671215641).

Almost surely, 2^{1131342431281} is an apocalyptic number.

It is an amenable number.

1131342431281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131342431281 is an equidigital number, since it uses as much as digits as its factorization.

1131342431281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

Adding to 1131342431281 its reverse (1821342431311), we get a palindrome (2952684862592).

The spelling of 1131342431281 in words is "one trillion, one hundred thirty-one billion, three hundred forty-two million, four hundred thirty-one thousand, two hundred eighty-one".