1131340236261 has 32 divisors (see below), whose sum is σ = 1559788339200. Its totient is φ = 728644083840.

The previous prime is 1131340236251. The next prime is 1131340236269. The reversal of 1131340236261 is 1626320431311.

It is not a de Polignac number, because 1131340236261 - 2⁹ = 1131340235749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131340236269) 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, 294081840 + ... + 294085686.

It is an arithmetic number, because the mean of its divisors is an integer number (48743385600).

Almost surely, 2^{1131340236261} is an apocalyptic number.

It is an amenable number.

1131340236261 is a deficient number, since it is larger than the sum of its proper divisors (428448102939).

1131340236261 is a wasteful number, since it uses less digits than its factorization.

1131340236261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489.

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 1131340236261 its reverse (1626320431311), we get a palindrome (2757660667572).

The spelling of 1131340236261 in words is "one trillion, one hundred thirty-one billion, three hundred forty million, two hundred thirty-six thousand, two hundred sixty-one".