21312422421312 has 448 divisors, whose sum is σ = 65713132154880. Its totient is φ = 6024572928000.

The previous prime is 21312422421299. The next prime is 21312422421403.

21312422421312 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×21312422421312³ (a number of 41 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21312422421312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2152547562 + ... + 2152557462.

It is an arithmetic number, because the mean of its divisors is an integer number (146681098560).

Almost surely, 2^{21312422421312} is an apocalyptic number.

21312422421312 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 21312422421312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32856566077440).

21312422421312 is an abundant number, since it is smaller than the sum of its proper divisors (44400709733568).

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

21312422421312 is a wasteful number, since it uses less digits than its factorization.

21312422421312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10470 (or 10460 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

It can be divided in two parts, 2131242 and 2421312, that added together give a palindrome (4552554).

The spelling of 21312422421312 in words is "twenty-one trillion, three hundred twelve billion, four hundred twenty-two million, four hundred twenty-one thousand, three hundred twelve".