211221010210 has 32 divisors (see below), whose sum is σ = 436409256960. Its totient is φ = 72102388032.

The previous prime is 211221010201. The next prime is 211221010213. The reversal of 211221010210 is 12010122112.

It is a super-2 number, since 2×211221010210² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221010213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6572274 + ... + 6604333.

It is an arithmetic number, because the mean of its divisors is an integer number (13637789280).

Almost surely, 2^211221010210 is an apocalyptic number.

211221010210 is an abundant number, since it is smaller than the sum of its proper divisors (225188246750).

211221010210 is a wasteful number, since it uses less digits than its factorization.

211221010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13176850.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211221010210 its reverse (12010122112), we get a palindrome (223231132322).

The spelling of 211221010210 in words is "two hundred eleven billion, two hundred twenty-one million, ten thousand, two hundred ten".