21102201210 has 16 divisors (see below), whose sum is σ = 50645282976. Its totient is φ = 5627253648.

The previous prime is 21102201187. The next prime is 21102201217. The reversal of 21102201210 is 1210220112.

21102201210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21102201217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351703324 + ... + 351703383.

It is an arithmetic number, because the mean of its divisors is an integer number (3165330186).

Almost surely, 2^21102201210 is an apocalyptic number.

21102201210 is an abundant number, since it is smaller than the sum of its proper divisors (29543081766).

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

21102201210 is a wasteful number, since it uses less digits than its factorization.

21102201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703406717.

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

Adding to 21102201210 its reverse (1210220112), we get a palindrome (22312421322).

The spelling of 21102201210 in words is "twenty-one billion, one hundred two million, two hundred one thousand, two hundred ten".