21331222231230 has 96 divisors (see below), whose sum is σ = 56812070446560. Its totient is φ = 5550057676800.

The previous prime is 21331222231201. The next prime is 21331222231301. The reversal of 21331222231230 is 3213222213312.

21331222231230 is a `hidden beast` number, since 2 + 1 + 3 + 312 + 2 + 2 + 2 + 312 + 30 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21331222231194 and 21331222231203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 628630 + ... + 6561830.

It is an arithmetic number, because the mean of its divisors is an integer number (591792400485).

Almost surely, 2^{21331222231230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21331222231230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28406035223280).

21331222231230 is an abundant number, since it is smaller than the sum of its proper divisors (35480848215330).

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

21331222231230 is a wasteful number, since it uses less digits than its factorization.

21331222231230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934186 (or 5934183 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21331222231230 its reverse (3213222213312), we get a palindrome (24544444444542).

The spelling of 21331222231230 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, two hundred thirty".