213021030012 has 24 divisors (see below), whose sum is σ = 568056080256. Its totient is φ = 60863151408.

The previous prime is 213021029989. The next prime is 213021030017. The reversal of 213021030012 is 210030120312.

It is a junction number, because it is equal to n+sod(n) for n = 213021029973 and 213021030000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213021030017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267982238 + ... + 1267982405.

It is an arithmetic number, because the mean of its divisors is an integer number (23669003344).

Almost surely, 2^213021030012 is an apocalyptic number.

It is an amenable number.

213021030012 is an abundant number, since it is smaller than the sum of its proper divisors (355035050244).

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

213021030012 is a wasteful number, since it uses less digits than its factorization.

213021030012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535964657 (or 2535964655 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 213021030012 its reverse (210030120312), we get a palindrome (423051150324).

The spelling of 213021030012 in words is "two hundred thirteen billion, twenty-one million, thirty thousand, twelve".