21223243444120 has 32 divisors (see below), whose sum is σ = 47752529710320. Its totient is φ = 8489256140160.

The previous prime is 21223243444111. The next prime is 21223243444163. The reversal of 21223243444120 is 2144434232212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7848655 + ... + 10200385.

Almost surely, 2^{21223243444120} is an apocalyptic number.

21223243444120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223243444120 is an abundant number, since it is smaller than the sum of its proper divisors (26529286266200).

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

21223243444120 is a wasteful number, since it uses less digits than its factorization.

21223243444120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577355 (or 2577351 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 21223243444120 its reverse (2144434232212), we get a palindrome (23367677676332).

The spelling of 21223243444120 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred forty-three million, four hundred forty-four thousand, one hundred twenty".