1231121341 has 2 divisors, whose sum is σ = 1231121342. Its totient is φ = 1231121340.

The previous prime is 1231121329. The next prime is 1231121357. The reversal of 1231121341 is 1431211321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1192320900 + 38800441 = 34530^2 + 6229^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231121341 - 2¹⁷ = 1230990269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231121141) 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 as a sum of consecutive naturals, namely, 615560670 + 615560671.

It is an arithmetic number, because the mean of its divisors is an integer number (615560671).

Almost surely, 2^1231121341 is an apocalyptic number.

It is an amenable number.

1231121341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231121341 is an equidigital number, since it uses as much as digits as its factorization.

1231121341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 1231121341 is about 35087.3387563092. The cubic root of 1231121341 is about 1071.7667672802.

Adding to 1231121341 its reverse (1431211321), we get a palindrome (2662332662).

The spelling of 1231121341 in words is "one billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred forty-one".