123030031 has 4 divisors (see below), whose sum is σ = 123378912. Its totient is φ = 122681152.

The previous prime is 123030029. The next prime is 123030043. The reversal of 123030031 is 130030321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123030031 - 2¹ = 123030029 is a prime.

It is a super-2 number, since 2×123030031² = 30272777055721922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123029993 and 123030020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123030431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173911 + ... + 174616.

It is an arithmetic number, because the mean of its divisors is an integer number (30844728).

Almost surely, 2^123030031 is an apocalyptic number.

123030031 is a deficient number, since it is larger than the sum of its proper divisors (348881).

123030031 is an equidigital number, since it uses as much as digits as its factorization.

123030031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348880.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 123030031 is about 11091.8903258191. The cubic root of 123030031 is about 497.3594542512.

Adding to 123030031 its reverse (130030321), we get a palindrome (253060352).

The spelling of 123030031 in words is "one hundred twenty-three million, thirty thousand, thirty-one".