21231302310120 has 384 divisors, whose sum is σ = 77349917399040. Its totient is φ = 4639739005440.

The previous prime is 21231302310077. The next prime is 21231302310187. The reversal of 21231302310120 is 2101320313212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 303308325 + ... + 303378315.

It is an arithmetic number, because the mean of its divisors is an integer number (201432076560).

Almost surely, 2^{21231302310120} is an apocalyptic number.

21231302310120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21231302310120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38674958699520).

21231302310120 is an abundant number, since it is smaller than the sum of its proper divisors (56118615088920).

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

21231302310120 is a wasteful number, since it uses less digits than its factorization.

21231302310120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72285 (or 72274 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21231302310120 its reverse (2101320313212), we get a palindrome (23332622623332).

The spelling of 21231302310120 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred two million, three hundred ten thousand, one hundred twenty".