213123120120 has 48 divisors (see below), whose sum is σ = 692650141560. Its totient is φ = 56832831936.

The previous prime is 213123120113. The next prime is 213123120209. The reversal of 213123120120 is 21021321312.

213123120120 is a `hidden beast` number, since 21 + 312 + 312 + 0 + 1 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 213123120093 and 213123120102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296003974 + ... + 296004693.

Almost surely, 2^213123120120 is an apocalyptic number.

213123120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213123120120 is an abundant number, since it is smaller than the sum of its proper divisors (479527021440).

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

213123120120 is a wasteful number, since it uses less digits than its factorization.

213123120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592008684 (or 592008677 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 213123120120 its reverse (21021321312), we get a palindrome (234144441432).

The spelling of 213123120120 in words is "two hundred thirteen billion, one hundred twenty-three million, one hundred twenty thousand, one hundred twenty".