221101020210 has 128 divisors (see below), whose sum is σ = 621555959808. Its totient is φ = 49279680000.

The previous prime is 221101020199. The next prime is 221101020271. The reversal of 221101020210 is 12020101122.

It is a super-2 number, since 2×221101020210² (a number of 23 digits) contains 22 as substring.

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, 20753385 + ... + 20764035.

It is an arithmetic number, because the mean of its divisors is an integer number (4855905936).

Almost surely, 2^221101020210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221101020210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310777979904).

221101020210 is an abundant number, since it is smaller than the sum of its proper divisors (400454939598).

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

221101020210 is a wasteful number, since it uses less digits than its factorization.

221101020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120.

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

Adding to 221101020210 its reverse (12020101122), we get a palindrome (233121121332).

The spelling of 221101020210 in words is "two hundred twenty-one billion, one hundred one million, twenty thousand, two hundred ten".