21123133222200 has 96 divisors (see below), whose sum is σ = 68928118972800. Its totient is φ = 5336370495360.

The previous prime is 21123133222183. The next prime is 21123133222201. The reversal of 21123133222200 is 222233132112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123133222201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 926441812 + ... + 926464611.

It is an arithmetic number, because the mean of its divisors is an integer number (718001239300).

Almost surely, 2^{21123133222200} is an apocalyptic number.

21123133222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21123133222200 is an abundant number, since it is smaller than the sum of its proper divisors (47804985750600).

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

21123133222200 is a wasteful number, since it uses less digits than its factorization.

21123133222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852906461 (or 1852906452 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21123133222200 its reverse (222233132112), we get a palindrome (21345366354312).

The spelling of 21123133222200 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred thirty-three million, two hundred twenty-two thousand, two hundred".