202120021110 has 96 divisors (see below), whose sum is σ = 565200253440. Its totient is φ = 46124019648.

The previous prime is 202120021087. The next prime is 202120021121. The reversal of 202120021110 is 11120021202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 798867 + ... + 1020993.

It is an arithmetic number, because the mean of its divisors is an integer number (5887502640).

Almost surely, 2^202120021110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202120021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282600126720).

202120021110 is an abundant number, since it is smaller than the sum of its proper divisors (363080232330).

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

202120021110 is a wasteful number, since it uses less digits than its factorization.

202120021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222770 (or 222763 counting only the distinct ones).

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

Adding to 202120021110 its reverse (11120021202), we get a palindrome (213240042312).

The spelling of 202120021110 in words is "two hundred two billion, one hundred twenty million, twenty-one thousand, one hundred ten".