21100202211020 has 48 divisors (see below), whose sum is σ = 44350096976640. Its totient is φ = 8432525340096.

The previous prime is 21100202211007. The next prime is 21100202211031. The reversal of 21100202211020 is 2011220200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100202210986 and 21100202211004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426043979 + ... + 426093501.

It is an arithmetic number, because the mean of its divisors is an integer number (923960353680).

Almost surely, 2^{21100202211020} is an apocalyptic number.

21100202211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100202211020 is an abundant number, since it is smaller than the sum of its proper divisors (23249894765620).

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

21100202211020 is a wasteful number, since it uses less digits than its factorization.

21100202211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68174 (or 68172 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21100202211020 its reverse (2011220200112), we get a palindrome (23111422411132).

The spelling of 21100202211020 in words is "twenty-one trillion, one hundred billion, two hundred two million, two hundred eleven thousand, twenty".