1231105103 has 2 divisors, whose sum is σ = 1231105104. Its totient is φ = 1231105102.

The previous prime is 1231105097. The next prime is 1231105177. The reversal of 1231105103 is 3015011321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231105103 - 2¹⁶ = 1231039567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231107103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615552551 + 615552552.

It is an arithmetic number, because the mean of its divisors is an integer number (615552552).

Almost surely, 2^1231105103 is an apocalyptic number.

1231105103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231105103 is an equidigital number, since it uses as much as digits as its factorization.

1231105103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1231105103 is about 35087.1073615367. The cubic root of 1231105103 is about 1071.7620552006.

Adding to 1231105103 its reverse (3015011321), we get a palindrome (4246116424).

The spelling of 1231105103 in words is "one billion, two hundred thirty-one million, one hundred five thousand, one hundred three".