21100344204210 has 16 divisors (see below), whose sum is σ = 50640826090176. Its totient is φ = 5626758454448.

The previous prime is 21100344204187. The next prime is 21100344204211. The reversal of 21100344204210 is 1240244300112.

It is a super-2 number, since 2×21100344204210² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21100344204211) 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, 351672403374 + ... + 351672403433.

It is an arithmetic number, because the mean of its divisors is an integer number (3165051630636).

Almost surely, 2^{21100344204210} is an apocalyptic number.

21100344204210 is an abundant number, since it is smaller than the sum of its proper divisors (29540481885966).

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

21100344204210 is a wasteful number, since it uses less digits than its factorization.

21100344204210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703344806817.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21100344204210 its reverse (1240244300112), we get a palindrome (22340588504322).

The spelling of 21100344204210 in words is "twenty-one trillion, one hundred billion, three hundred forty-four million, two hundred four thousand, two hundred ten".