213202120212 has 18 divisors (see below), whose sum is σ = 538927581738. Its totient is φ = 71067373392.

The previous prime is 213202120193. The next prime is 213202120267. The reversal of 213202120212 is 212021202312.

It can be written as a sum of positive squares in only one way, i.e., 114754272516 + 98447847696 = 338754^2 + 313764^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2961140523 + ... + 2961140594.

Almost surely, 2^213202120212 is an apocalyptic number.

It is an amenable number.

213202120212 is an abundant number, since it is smaller than the sum of its proper divisors (325725461526).

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

213202120212 is a wasteful number, since it uses less digits than its factorization.

213202120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922281127 (or 5922281122 counting only the distinct ones).

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

Adding to 213202120212 its reverse (212021202312), we get a palindrome (425223322524).

The spelling of 213202120212 in words is "two hundred thirteen billion, two hundred two million, one hundred twenty thousand, two hundred twelve".