201021202110 has 128 divisors (see below), whose sum is σ = 510078850560. Its totient is φ = 50623372800.

The previous prime is 201021202103. The next prime is 201021202153. The reversal of 201021202110 is 11202120102.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15255825 + ... + 15268995.

It is an arithmetic number, because the mean of its divisors is an integer number (3984991020).

Almost surely, 2^201021202110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201021202110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255039425280).

201021202110 is an abundant number, since it is smaller than the sum of its proper divisors (309057648450).

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

201021202110 is a wasteful number, since it uses less digits than its factorization.

201021202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13594.

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

Adding to 201021202110 its reverse (11202120102), we get a palindrome (212223322212).

The spelling of 201021202110 in words is "two hundred one billion, twenty-one million, two hundred two thousand, one hundred ten".