212021213202 has 20 divisors (see below), whose sum is σ = 475084570686. Its totient is φ = 70673737680.

The previous prime is 212021213189. The next prime is 212021213231. The reversal of 212021213202 is 202312120212.

212021213202 is a `hidden beast` number, since 21 + 202 + 121 + 320 + 2 = 666.

212021213202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 150403576761 + 61617636441 = 387819^2 + 248229^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 654386299 + ... + 654386622.

Almost surely, 2^212021213202 is an apocalyptic number.

212021213202 is an abundant number, since it is smaller than the sum of its proper divisors (263063357484).

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

212021213202 is a wasteful number, since it uses less digits than its factorization.

212021213202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308772935 (or 1308772926 counting only the distinct ones).

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

Adding to 212021213202 its reverse (202312120212), we get a palindrome (414333333414).

The spelling of 212021213202 in words is "two hundred twelve billion, twenty-one million, two hundred thirteen thousand, two hundred two".