1231532123 has 2 divisors, whose sum is σ = 1231532124. Its totient is φ = 1231532122.

The previous prime is 1231532059. The next prime is 1231532131. The reversal of 1231532123 is 3212351321.

It is a strong prime.

It is an emirp because it is prime and its reverse (3212351321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231532123 - 2⁶ = 1231532059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231532143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615766061 + 615766062.

It is an arithmetic number, because the mean of its divisors is an integer number (615766062).

Almost surely, 2^1231532123 is an apocalyptic number.

1231532123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231532123 is an equidigital number, since it uses as much as digits as its factorization.

1231532123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 1231532123 is about 35093.1919750826. The cubic root of 1231532123 is about 1071.8859576811.

Adding to 1231532123 its reverse (3212351321), we get a palindrome (4443883444).

The spelling of 1231532123 in words is "one billion, two hundred thirty-one million, five hundred thirty-two thousand, one hundred twenty-three".