21122110110200 has 192 divisors, whose sum is σ = 56560378118400. Its totient is φ = 7254919526400.

The previous prime is 21122110110163. The next prime is 21122110110301. The reversal of 21122110110200 is 201101122112.

It is a super-2 number, since 2×21122110110200² (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 47 ways as a sum of consecutive naturals, for example, 13336877 + ... + 14836323.

It is an arithmetic number, because the mean of its divisors is an integer number (294585302700).

Almost surely, 2^{21122110110200} is an apocalyptic number.

21122110110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122110110200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28280189059200).

21122110110200 is an abundant number, since it is smaller than the sum of its proper divisors (35438268008200).

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

21122110110200 is a wasteful number, since it uses less digits than its factorization.

21122110110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499830 (or 1499821 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21122110110200 its reverse (201101122112), we get a palindrome (21323211232312).

The spelling of 21122110110200 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred ten million, one hundred ten thousand, two hundred".