1131243102005 has 4 divisors (see below), whose sum is σ = 1357491722412. Its totient is φ = 904994481600.

The previous prime is 1131243101999. The next prime is 1131243102013. The reversal of 1131243102005 is 5002013421311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 278202447601 + 853040654404 = 527449^2 + 923602^2 .

It is not a de Polignac number, because 1131243102005 - 2⁸ = 1131243101749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113124310196 + ... + 113124310205.

It is an arithmetic number, because the mean of its divisors is an integer number (339372930603).

Almost surely, 2^{1131243102005} is an apocalyptic number.

It is an amenable number.

1131243102005 is a deficient number, since it is larger than the sum of its proper divisors (226248620407).

1131243102005 is an equidigital number, since it uses as much as digits as its factorization.

1131243102005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226248620406.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1131243102005 its reverse (5002013421311), we get a palindrome (6133256523316).

The spelling of 1131243102005 in words is "one trillion, one hundred thirty-one billion, two hundred forty-three million, one hundred two thousand, five".