21232312212200 has 48 divisors (see below), whose sum is σ = 49365858106080. Its totient is φ = 8492798912960.

The previous prime is 21232312212173. The next prime is 21232312212203. The reversal of 21232312212200 is 221221323212.

It is a happy number.

It is a super-2 number, since 2×21232312212200² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21232312212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13364567 + ... + 14868633.

It is an arithmetic number, because the mean of its divisors is an integer number (1028455377210).

Almost surely, 2^{21232312212200} is an apocalyptic number.

21232312212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232312212200 is an abundant number, since it is smaller than the sum of its proper divisors (28133545893880).

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

21232312212200 is a wasteful number, since it uses less digits than its factorization.

21232312212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574666 (or 1574657 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21232312212200 its reverse (221221323212), we get a palindrome (21453533535412).

The spelling of 21232312212200 in words is "twenty-one trillion, two hundred thirty-two billion, three hundred twelve million, two hundred twelve thousand, two hundred".