21304211240312 has 128 divisors (see below), whose sum is σ = 53650852416000. Its totient is φ = 7659300902400.

The previous prime is 21304211240239. The next prime is 21304211240353.

It is a happy number.

21304211240312 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23670314 + ... + 24553862.

It is an arithmetic number, because the mean of its divisors is an integer number (419147284500).

Almost surely, 2^{21304211240312} is an apocalyptic number.

21304211240312 is a gapful number since it is divisible by the number (22) 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 21304211240312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26825426208000).

21304211240312 is an abundant number, since it is smaller than the sum of its proper divisors (32346641175688).

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

21304211240312 is a wasteful number, since it uses less digits than its factorization.

21304211240312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886597 (or 886593 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

It can be divided in two parts, 2130421 and 1240312, that added together give a palindrome (3370733).

The spelling of 21304211240312 in words is "twenty-one trillion, three hundred four billion, two hundred eleven million, two hundred forty thousand, three hundred twelve".