1241231311 has 2 divisors, whose sum is σ = 1241231312. Its totient is φ = 1241231310.

The previous prime is 1241231279. The next prime is 1241231339. The reversal of 1241231311 is 1131321421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1241231311 - 2⁵ = 1241231279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241237311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620615655 + 620615656.

It is an arithmetic number, because the mean of its divisors is an integer number (620615656).

Almost surely, 2^1241231311 is an apocalyptic number.

1241231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241231311 is an equidigital number, since it uses as much as digits as its factorization.

1241231311 is an evil number, because the sum of its binary digits is even.

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

The square root of 1241231311 is about 35231.1128265912. The cubic root of 1241231311 is about 1074.6925563214.

Adding to 1241231311 its reverse (1131321421), we get a palindrome (2372552732).

The spelling of 1241231311 in words is "one billion, two hundred forty-one million, two hundred thirty-one thousand, three hundred eleven".