21303113223312 has 160 divisors (see below), whose sum is σ = 63181480412160. Its totient is φ = 6865315107840.

The previous prime is 21303113223269. The next prime is 21303113223317. The reversal of 21303113223312 is 21332231130312.

21303113223312 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 3 + 1 + 1 + 322 + 331 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21303113223317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13063978 + ... + 14603894.

It is an arithmetic number, because the mean of its divisors is an integer number (394884252576).

Almost surely, 2^{21303113223312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21303113223312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31590740206080).

21303113223312 is an abundant number, since it is smaller than the sum of its proper divisors (41878367188848).

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

21303113223312 is a wasteful number, since it uses less digits than its factorization.

21303113223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540998 (or 1540986 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21303113223312 its reverse (21332231130312), we get a palindrome (42635344353624).

The spelling of 21303113223312 in words is "twenty-one trillion, three hundred three billion, one hundred thirteen million, two hundred twenty-three thousand, three hundred twelve".