210221100212 has 6 divisors (see below), whose sum is σ = 367886925378. Its totient is φ = 105110550104.

The previous prime is 210221100197. The next prime is 210221100217. The reversal of 210221100212 is 212001122012.

210221100212 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., 172412631076 + 37808469136 = 415226^2 + 194444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221100217) by changing a digit.

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 as a sum of consecutive naturals, namely, 26277637523 + ... + 26277637530.

It is an arithmetic number, because the mean of its divisors is an integer number (61314487563).

Almost surely, 2^210221100212 is an apocalyptic number.

It is an amenable number.

210221100212 is a deficient number, since it is larger than the sum of its proper divisors (157665825166).

210221100212 is a wasteful number, since it uses less digits than its factorization.

210221100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52555275057 (or 52555275055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210221100212 its reverse (212001122012), we get a palindrome (422222222224).

The spelling of 210221100212 in words is "two hundred ten billion, two hundred twenty-one million, one hundred thousand, two hundred twelve".