1231310123 has 8 divisors (see below), whose sum is σ = 1238202960. Its totient is φ = 1224427680.

The previous prime is 1231310081. The next prime is 1231310141. The reversal of 1231310123 is 3210131321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231310123 - 2¹⁶ = 1231244587 is a prime.

It is a super-2 number, since 2×1231310123² = 3032249238004550258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231313123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394493 + ... + 397601.

It is an arithmetic number, because the mean of its divisors is an integer number (154775370).

Almost surely, 2^1231310123 is an apocalyptic number.

1231310123 is a deficient number, since it is larger than the sum of its proper divisors (6892837).

1231310123 is a wasteful number, since it uses less digits than its factorization.

1231310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1231310123 is about 35090.0288258645. The cubic root of 1231310123 is about 1071.8215465902.

Adding to 1231310123 its reverse (3210131321), we get a palindrome (4441441444).

The spelling of 1231310123 in words is "one billion, two hundred thirty-one million, three hundred ten thousand, one hundred twenty-three".