210221121222110 has 16 divisors (see below), whose sum is σ = 378436587127632. Its totient is φ = 84079877616000.

The previous prime is 210221121222089. The next prime is 210221121222113. The reversal of 210221121222110 is 11222121122012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221121222113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071256091 + ... + 1071452310.

It is an arithmetic number, because the mean of its divisors is an integer number (23652286695477).

Almost surely, 2^{210221121222110} is an apocalyptic number.

210221121222110 is a deficient number, since it is larger than the sum of its proper divisors (168215465905522).

210221121222110 is a wasteful number, since it uses less digits than its factorization.

210221121222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142718219.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 210221121222110 its reverse (11222121122012), we get a palindrome (221443242344122).

It can be divided in two parts, 21022112 and 1222110, that added together give a palindrome (22244222).

The spelling of 210221121222110 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred ten".