21121110110200 has 24 divisors (see below), whose sum is σ = 49106581006680. Its totient is φ = 8448444044000.

The previous prime is 21121110110081. The next prime is 21121110110227. The reversal of 21121110110200 is 201101112112.

It is a happy number.

It is a super-2 number, since 2×21121110110200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52802775076 + ... + 52802775475.

It is an arithmetic number, because the mean of its divisors is an integer number (2046107541945).

Almost surely, 2^{21121110110200} is an apocalyptic number.

21121110110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121110110200 is an abundant number, since it is smaller than the sum of its proper divisors (27985470896480).

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

21121110110200 is a wasteful number, since it uses less digits than its factorization.

21121110110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105605550567 (or 105605550558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21121110110200 its reverse (201101112112), we get a palindrome (21322211222312).

The spelling of 21121110110200 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, one hundred ten thousand, two hundred".