21202121120110 has 48 divisors (see below), whose sum is σ = 44410915982160. Its totient is φ = 7266634488960.

The previous prime is 21202121120093. The next prime is 21202121120111. The reversal of 21202121120110 is 1102112120212.

21202121120110 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202121120111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6590536 + ... + 9264955.

It is an arithmetic number, because the mean of its divisors is an integer number (925227416295).

Almost surely, 2^{21202121120110} is an apocalyptic number.

21202121120110 is an abundant number, since it is smaller than the sum of its proper divisors (23208794862050).

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

21202121120110 is a wasteful number, since it uses less digits than its factorization.

21202121120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15858241 (or 15858234 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21202121120110 its reverse (1102112120212), we get a palindrome (22304233240322).

The spelling of 21202121120110 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred ten".