1131222232211 has 2 divisors, whose sum is σ = 1131222232212. Its totient is φ = 1131222232210.

The previous prime is 1131222232193. The next prime is 1131222232213. The reversal of 1131222232211 is 1122322221311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131222232211 - 2³⁸ = 856344325267 is a prime.

Together with 1131222232213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1131222232213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565611116105 + 565611116106.

It is an arithmetic number, because the mean of its divisors is an integer number (565611116106).

Almost surely, 2^{1131222232211} is an apocalyptic number.

1131222232211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131222232211 is an equidigital number, since it uses as much as digits as its factorization.

1131222232211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

Adding to 1131222232211 its reverse (1122322221311), we get a palindrome (2253544453522).

The spelling of 1131222232211 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-two million, two hundred thirty-two thousand, two hundred eleven".