211021210204 has 24 divisors (see below), whose sum is σ = 430005487968. Its totient is φ = 88731289920.

The previous prime is 211021210189. The next prime is 211021210207. The reversal of 211021210204 is 402012120112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021210207) 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, 71097307 + ... + 71100274.

It is an arithmetic number, because the mean of its divisors is an integer number (17916895332).

Almost surely, 2^211021210204 is an apocalyptic number.

It is an amenable number.

211021210204 is an abundant number, since it is smaller than the sum of its proper divisors (218984277764).

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

211021210204 is a wasteful number, since it uses less digits than its factorization.

211021210204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142197645 (or 142197643 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211021210204 its reverse (402012120112), we get a palindrome (613033330316).

The spelling of 211021210204 in words is "two hundred eleven billion, twenty-one million, two hundred ten thousand, two hundred four".