221001210210 has 128 divisors (see below), whose sum is σ = 605516083200. Its totient is φ = 51099206400.

The previous prime is 221001210203. The next prime is 221001210229. The reversal of 221001210210 is 12012100122.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2607195 + ... + 2690625.

It is an arithmetic number, because the mean of its divisors is an integer number (4730594400).

Almost surely, 2^221001210210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221001210210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302758041600).

221001210210 is an abundant number, since it is smaller than the sum of its proper divisors (384514872990).

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

221001210210 is a wasteful number, since it uses less digits than its factorization.

221001210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83824.

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

Adding to 221001210210 its reverse (12012100122), we get a palindrome (233013310332).

It can be divided in two parts, 2210012 and 10210, that added together give a palindrome (2220222).

The spelling of 221001210210 in words is "two hundred twenty-one billion, one million, two hundred ten thousand, two hundred ten".