21331230126 has 8 divisors (see below), whose sum is σ = 42662460264. Its totient is φ = 7110410040.

The previous prime is 21331230119. The next prime is 21331230161. The reversal of 21331230126 is 62103213312.

It is a sphenic number, since it is the product of 3 distinct primes.

21331230126 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21331230096 and 21331230105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777602505 + ... + 1777602516.

It is an arithmetic number, because the mean of its divisors is an integer number (5332807533).

Almost surely, 2^21331230126 is an apocalyptic number.

21331230126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21331230126 is a wasteful number, since it uses less digits than its factorization.

21331230126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555205026.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21331230126 its reverse (62103213312), we get a palindrome (83434443438).

The spelling of 21331230126 in words is "twenty-one billion, three hundred thirty-one million, two hundred thirty thousand, one hundred twenty-six".