1131222331121 has 2 divisors, whose sum is σ = 1131222331122. Its totient is φ = 1131222331120.

The previous prime is 1131222331117. The next prime is 1131222331123. The reversal of 1131222331121 is 1211332221311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1131168382096 + 53949025 = 1063564^2 + 7345^2 .

It is an emirp because it is prime and its reverse (1211332221311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131222331121 - 2² = 1131222331117 is a prime.

Together with 1131222331123, 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 (1131222331123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565611165560 + 565611165561.

It is an arithmetic number, because the mean of its divisors is an integer number (565611165561).

Almost surely, 2^{1131222331121} is an apocalyptic number.

It is an amenable number.

1131222331121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131222331121 is an equidigital number, since it uses as much as digits as its factorization.

1131222331121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

Adding to 1131222331121 its reverse (1211332221311), we get a palindrome (2342554552432).

The spelling of 1131222331121 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-two million, three hundred thirty-one thousand, one hundred twenty-one".