123231012130 has 16 divisors (see below), whose sum is σ = 221819948280. Its totient is φ = 49291487872.

The previous prime is 123231012103. The next prime is 123231012137. The reversal of 123231012130 is 31210132321.

It can be written as a sum of positive squares in 4 ways, for example, as 85586087601 + 37644924529 = 292551^2 + 194023^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123231012098 and 123231012107.

It is not an unprimeable number, because it can be changed into a prime (123231012137) 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, 789102 + ... + 932278.

Almost surely, 2^123231012130 is an apocalyptic number.

123231012130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123231012130 is a deficient number, since it is larger than the sum of its proper divisors (98588936150).

123231012130 is a wasteful number, since it uses less digits than its factorization.

123231012130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229253.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123231012130 its reverse (31210132321), we get a palindrome (154441144451).

The spelling of 123231012130 in words is "one hundred twenty-three billion, two hundred thirty-one million, twelve thousand, one hundred thirty".