213012123210 has 48 divisors (see below), whose sum is σ = 560842064640. Its totient is φ = 56084202720.

The previous prime is 213012123197. The next prime is 213012123217. The reversal of 213012123210 is 12321210312.

213012123210 is a `hidden beast` number, since 2 + 130 + 1 + 212 + 321 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (213012123217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14972646 + ... + 14986865.

It is an arithmetic number, because the mean of its divisors is an integer number (11684209680).

Almost surely, 2^213012123210 is an apocalyptic number.

213012123210 is an abundant number, since it is smaller than the sum of its proper divisors (347829941430).

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

213012123210 is a wasteful number, since it uses less digits than its factorization.

213012123210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29959603 (or 29959600 counting only the distinct ones).

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

Adding to 213012123210 its reverse (12321210312), we get a palindrome (225333333522).

The spelling of 213012123210 in words is "two hundred thirteen billion, twelve million, one hundred twenty-three thousand, two hundred ten".