21101102210000 has 100 divisors (see below), whose sum is σ = 51583879899552. Its totient is φ = 8358494448000.

The previous prime is 21101102209997. The next prime is 21101102210009. The reversal of 21101102210000 is 1220110112.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101102210009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9213254 + ... + 11273253.

Almost surely, 2^{21101102210000} is an apocalyptic number.

21101102210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101102210000 is an abundant number, since it is smaller than the sum of its proper divisors (30482777689552).

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

21101102210000 is a wasteful number, since it uses less digits than its factorization.

21101102210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20486638 (or 20486617 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101102210000 its reverse (1220110112), we get a palindrome (21102322320112).

The spelling of 21101102210000 in words is "twenty-one trillion, one hundred one billion, one hundred two million, two hundred ten thousand".