210131023123 has 12 divisors (see below), whose sum is σ = 258816843432. Its totient is φ = 169517463360.

The previous prime is 210131023111. The next prime is 210131023147. The reversal of 210131023123 is 321320131012.

210131023123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210131023123 - 2⁹ = 210131022611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210131023123.

It is not an unprimeable number, because it can be changed into a prime (210131023153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126128233 + ... + 126129898.

It is an arithmetic number, because the mean of its divisors is an integer number (21568070286).

Almost surely, 2^210131023123 is an apocalyptic number.

210131023123 is a deficient number, since it is larger than the sum of its proper divisors (48685820309).

210131023123 is a wasteful number, since it uses less digits than its factorization.

210131023123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252258162 (or 252258155 counting only the distinct ones).

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

Adding to 210131023123 its reverse (321320131012), we get a palindrome (531451154135).

The spelling of 210131023123 in words is "two hundred ten billion, one hundred thirty-one million, twenty-three thousand, one hundred twenty-three".