1231103311 has 2 divisors, whose sum is σ = 1231103312. Its totient is φ = 1231103310.

The previous prime is 1231103299. The next prime is 1231103417. The reversal of 1231103311 is 1133011321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231103311 - 2²¹ = 1229006159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231103611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615551655 + 615551656.

It is an arithmetic number, because the mean of its divisors is an integer number (615551656).

Almost surely, 2^1231103311 is an apocalyptic number.

1231103311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231103311 is an equidigital number, since it uses as much as digits as its factorization.

1231103311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1231103311 is about 35087.0818250820. The cubic root of 1231103311 is about 1071.7615351804.

Adding to 1231103311 its reverse (1133011321), we get a palindrome (2364114632).

The spelling of 1231103311 in words is "one billion, two hundred thirty-one million, one hundred three thousand, three hundred eleven".