210021220110 has 128 divisors (see below), whose sum is σ = 552620880000. Its totient is φ = 50772344832.

The previous prime is 210021220069. The next prime is 210021220147. The reversal of 210021220110 is 11022120012.

It is a congruent number.

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, 5151486 + ... + 5192094.

It is an arithmetic number, because the mean of its divisors is an integer number (4317350625).

Almost surely, 2^210021220110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210021220110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276310440000).

210021220110 is an abundant number, since it is smaller than the sum of its proper divisors (342599659890).

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

210021220110 is a wasteful number, since it uses less digits than its factorization.

210021220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40870.

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

Adding to 210021220110 its reverse (11022120012), we get a palindrome (221043340122).

The spelling of 210021220110 in words is "two hundred ten billion, twenty-one million, two hundred twenty thousand, one hundred ten".