21110000011220 has 48 divisors (see below), whose sum is σ = 44957498294016. Its totient is φ = 8324678208000.

The previous prime is 21110000011193. The next prime is 21110000011277. The reversal of 21110000011220 is 2211000001112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30774380 + ... + 31452860.

It is an arithmetic number, because the mean of its divisors is an integer number (936614547792).

Almost surely, 2^{21110000011220} is an apocalyptic number.

21110000011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110000011220 is an abundant number, since it is smaller than the sum of its proper divisors (23847498282796).

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

21110000011220 is a wasteful number, since it uses less digits than its factorization.

21110000011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700472 (or 700470 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110000011220 its reverse (2211000001112), we get a palindrome (23321000012332).

The spelling of 21110000011220 in words is "twenty-one trillion, one hundred ten billion, eleven thousand, two hundred twenty".