21223223132220 has 36 divisors (see below), whose sum is σ = 64377110168280. Its totient is φ = 5659526168544.

The previous prime is 21223223132213. The next prime is 21223223132239. The reversal of 21223223132220 is 2223132232212.

21223223132220 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 322 + 313 + 2 + 2 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58953397410 + ... + 58953397769.

It is an arithmetic number, because the mean of its divisors is an integer number (1788253060230).

Almost surely, 2^{21223223132220} is an apocalyptic number.

21223223132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223223132220 is an abundant number, since it is smaller than the sum of its proper divisors (43153887036060).

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

21223223132220 is a wasteful number, since it uses less digits than its factorization.

21223223132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117906795194 (or 117906795189 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21223223132220 its reverse (2223132232212), we get a palindrome (23446355364432).

The spelling of 21223223132220 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty-three million, one hundred thirty-two thousand, two hundred twenty".