21202111021210 has 96 divisors (see below), whose sum is σ = 45094075004160. Its totient is φ = 7155610576128.

The previous prime is 21202111021181. The next prime is 21202111021213. The reversal of 21202111021210 is 1212011120212.

21202111021210 is digitally balanced in base 6, 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 (21202111021213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7170726 + ... + 9686254.

It is an arithmetic number, because the mean of its divisors is an integer number (469729947960).

Almost surely, 2^{21202111021210} is an apocalyptic number.

21202111021210 is an abundant number, since it is smaller than the sum of its proper divisors (23891963982950).

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

21202111021210 is a wasteful number, since it uses less digits than its factorization.

21202111021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515820 (or 2515813 counting only the distinct ones).

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

Adding to 21202111021210 its reverse (1212011120212), we get a palindrome (22414122141422).

The spelling of 21202111021210 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, twenty-one thousand, two hundred ten".