20211210210 has 64 divisors (see below), whose sum is σ = 50980285440. Its totient is φ = 5118210240.

The previous prime is 20211210199. The next prime is 20211210221. The reversal of 20211210210 is 1201211202.

It is an interprime number because it is at equal distance from previous prime (20211210199) and next prime (20211210221).

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 31 ways as a sum of consecutive naturals, for example, 9456 + ... + 201275.

It is an arithmetic number, because the mean of its divisors is an integer number (796566960).

Almost surely, 2^20211210210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211210210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25490142720).

20211210210 is an abundant number, since it is smaller than the sum of its proper divisors (30769075230).

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

20211210210 is a wasteful number, since it uses less digits than its factorization.

20211210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210903.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211210210 its reverse (1201211202), we get a palindrome (21412421412).

The spelling of 20211210210 in words is "twenty billion, two hundred eleven million, two hundred ten thousand, two hundred ten".