21220100111210 has 256 divisors, whose sum is σ = 51644872581120. Its totient is φ = 6062509808640.

The previous prime is 21220100111207. The next prime is 21220100111219. The reversal of 21220100111210 is 1211100102212.

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

It is not an unprimeable number, because it can be changed into a prime (21220100111219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 883901027 + ... + 883925033.

It is an arithmetic number, because the mean of its divisors is an integer number (201737783520).

Almost surely, 2^{21220100111210} is an apocalyptic number.

21220100111210 is an abundant number, since it is smaller than the sum of its proper divisors (30424772469910).

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

21220100111210 is a wasteful number, since it uses less digits than its factorization.

21220100111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24661.

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

Adding to 21220100111210 its reverse (1211100102212), we get a palindrome (22431200213422).

The spelling of 21220100111210 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, one hundred eleven thousand, two hundred ten".