123021210204 has 36 divisors (see below), whose sum is σ = 313823229720. Its totient is φ = 40630857120.

The previous prime is 123021210167. The next prime is 123021210287. The reversal of 123021210204 is 402012120321.

It is a happy number.

123021210204 is a `hidden beast` number, since 1 + 230 + 21 + 210 + 204 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15671562 + ... + 15679409.

Almost surely, 2^123021210204 is an apocalyptic number.

It is an amenable number.

123021210204 is an abundant number, since it is smaller than the sum of its proper divisors (190802019516).

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

123021210204 is a wasteful number, since it uses less digits than its factorization.

123021210204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31351090 (or 31351085 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 123021210204 its reverse (402012120321), we get a palindrome (525033330525).

The spelling of 123021210204 in words is "one hundred twenty-three billion, twenty-one million, two hundred ten thousand, two hundred four".