21101021102200 has 96 divisors (see below), whose sum is σ = 53034600880800. Its totient is φ = 7761521871360.

The previous prime is 21101021102179. The next prime is 21101021102233. The reversal of 21101021102200 is 220112010112.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14745435 + ... + 16113034.

It is an arithmetic number, because the mean of its divisors is an integer number (552443759175).

Almost surely, 2^{21101021102200} is an apocalyptic number.

21101021102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101021102200 is an abundant number, since it is smaller than the sum of its proper divisors (31933579778600).

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

21101021102200 is a wasteful number, since it uses less digits than its factorization.

21101021102200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30858761 (or 30858752 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21101021102200 its reverse (220112010112), we get a palindrome (21321133112312).

The spelling of 21101021102200 in words is "twenty-one trillion, one hundred one billion, twenty-one million, one hundred two thousand, two hundred".