210123203120 has 80 divisors (see below), whose sum is σ = 509879240640. Its totient is φ = 80378867712.

The previous prime is 210123203111. The next prime is 210123203153. The reversal of 210123203120 is 21302321012.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13551212 + ... + 13566708.

It is an arithmetic number, because the mean of its divisors is an integer number (6373490508).

Almost surely, 2^210123203120 is an apocalyptic number.

210123203120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210123203120 is an abundant number, since it is smaller than the sum of its proper divisors (299756037520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210123203120 is a wasteful number, since it uses less digits than its factorization.

210123203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22902 (or 22896 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 210123203120 its reverse (21302321012), we get a palindrome (231425524132).

The spelling of 210123203120 in words is "two hundred ten billion, one hundred twenty-three million, two hundred three thousand, one hundred twenty".