21230231033320 has 16 divisors (see below), whose sum is σ = 47768019825060. Its totient is φ = 8492092413312.

The previous prime is 21230231033317. The next prime is 21230231033371. The reversal of 21230231033320 is 2333013203212.

It can be written as a sum of positive squares in 2 ways, for example, as 19198961882244 + 2031269151076 = 4381662^2 + 1425226^2 .

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, 265377887877 + ... + 265377887956.

Almost surely, 2^{21230231033320} is an apocalyptic number.

21230231033320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230231033320 is an abundant number, since it is smaller than the sum of its proper divisors (26537788791740).

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

21230231033320 is a wasteful number, since it uses less digits than its factorization.

21230231033320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530755775844 (or 530755775840 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21230231033320 its reverse (2333013203212), we get a palindrome (23563244236532).

The spelling of 21230231033320 in words is "twenty-one trillion, two hundred thirty billion, two hundred thirty-one million, thirty-three thousand, three hundred twenty".