210221121110 has 128 divisors (see below), whose sum is σ = 508332561408. Its totient is φ = 60450624000.

The previous prime is 210221121059. The next prime is 210221121137. The reversal of 210221121110 is 11121122012.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 23428925 + ... + 23437895.

It is an arithmetic number, because the mean of its divisors is an integer number (3971348136).

Almost surely, 2^210221121110 is an apocalyptic number.

210221121110 is an abundant number, since it is smaller than the sum of its proper divisors (298111440298).

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

210221121110 is a wasteful number, since it uses less digits than its factorization.

210221121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210221121110 its reverse (11121122012), we get a palindrome (221342243122).

The spelling of 210221121110 in words is "two hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred ten".