11142331261 has 2 divisors, whose sum is σ = 11142331262. Its totient is φ = 11142331260.

The previous prime is 11142331169. The next prime is 11142331273. The reversal of 11142331261 is 16213324111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9335231161 + 1807100100 = 96619^2 + 42510^2 .

It is an emirp because it is prime and its reverse (16213324111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11142331261 - 2⁷ = 11142331133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11142331061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5571165630 + 5571165631.

It is an arithmetic number, because the mean of its divisors is an integer number (5571165631).

Almost surely, 2^11142331261 is an apocalyptic number.

It is an amenable number.

11142331261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11142331261 is an equidigital number, since it uses as much as digits as its factorization.

11142331261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

Adding to 11142331261 its reverse (16213324111), we get a palindrome (27355655372).

The spelling of 11142331261 in words is "eleven billion, one hundred forty-two million, three hundred thirty-one thousand, two hundred sixty-one".