1231101123 has 8 divisors (see below), whose sum is σ = 1875963648. Its totient is φ = 703486344.

The previous prime is 1231101097. The next prime is 1231101149. The reversal of 1231101123 is 3211011321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231101097) and next prime (1231101149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231101123 - 2⁸ = 1231100867 is a prime.

It is a super-2 number, since 2×1231101123² = 3031219950103722258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231101923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29311911 + ... + 29311952.

It is an arithmetic number, because the mean of its divisors is an integer number (234495456).

Almost surely, 2^1231101123 is an apocalyptic number.

1231101123 is a deficient number, since it is larger than the sum of its proper divisors (644862525).

1231101123 is an equidigital number, since it uses as much as digits as its factorization.

1231101123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58623873.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1231101123 is about 35087.0506455017. The cubic root of 1231101123 is about 1071.7609002443.

Adding to 1231101123 its reverse (3211011321), we get a palindrome (4442112444).

The spelling of 1231101123 in words is "one billion, two hundred thirty-one million, one hundred one thousand, one hundred twenty-three".