21110223200 has 72 divisors (see below), whose sum is σ = 56220386040. Its totient is φ = 7676441600.

The previous prime is 21110223181. The next prime is 21110223203. The reversal of 21110223200 is 232201112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110223203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1190645 + ... + 1208244.

It is an arithmetic number, because the mean of its divisors is an integer number (780838695).

Almost surely, 2^21110223200 is an apocalyptic number.

21110223200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110223200 is an abundant number, since it is smaller than the sum of its proper divisors (35110162840).

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

21110223200 is a wasteful number, since it uses less digits than its factorization.

21110223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398920 (or 2398907 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21110223200 its reverse (232201112), we get a palindrome (21342424312).

The spelling of 21110223200 in words is "twenty-one billion, one hundred ten million, two hundred twenty-three thousand, two hundred".