212031030123 has 18 divisors (see below), whose sum is σ = 336640636332. Its totient is φ = 128503653960.

The previous prime is 212031030121. The next prime is 212031030137. The reversal of 212031030123 is 321030130212.

It is not a de Polignac number, because 212031030123 - 2¹ = 212031030121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212031030096 and 212031030105.

It is not an unprimeable number, because it can be changed into a prime (212031030121) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 97350165 + ... + 97352342.

It is an arithmetic number, because the mean of its divisors is an integer number (18702257574).

Almost surely, 2^212031030123 is an apocalyptic number.

212031030123 is a deficient number, since it is larger than the sum of its proper divisors (124609606209).

212031030123 is a wasteful number, since it uses less digits than its factorization.

212031030123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194702535 (or 194702521 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 212031030123 its reverse (321030130212), we get a palindrome (533061160335).

The spelling of 212031030123 in words is "two hundred twelve billion, thirty-one million, thirty thousand, one hundred twenty-three".