1231106243 has 2 divisors, whose sum is σ = 1231106244. Its totient is φ = 1231106242.

The previous prime is 1231106183. The next prime is 1231106281. The reversal of 1231106243 is 3426011321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231106243 - 2⁶ = 1231106179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231106543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615553121 + 615553122.

It is an arithmetic number, because the mean of its divisors is an integer number (615553122).

Almost surely, 2^1231106243 is an apocalyptic number.

1231106243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231106243 is an equidigital number, since it uses as much as digits as its factorization.

1231106243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1231106243 is about 35087.1236068162. The cubic root of 1231106243 is about 1071.7623860167.

Adding to 1231106243 its reverse (3426011321), we get a palindrome (4657117564).

The spelling of 1231106243 in words is "one billion, two hundred thirty-one million, one hundred six thousand, two hundred forty-three".