21114414012 has 96 divisors (see below), whose sum is σ = 53225061120. Its totient is φ = 6493132800.

The previous prime is 21114413981. The next prime is 21114414019. The reversal of 21114414012 is 21041441112.

It is a super-2 number, since 2×21114414012² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21114414012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114414019) 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, 3457762 + ... + 3463862.

It is an arithmetic number, because the mean of its divisors is an integer number (554427720).

Almost surely, 2^21114414012 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 21114414012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26612530560).

21114414012 is an abundant number, since it is smaller than the sum of its proper divisors (32110647108).

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

21114414012 is a wasteful number, since it uses less digits than its factorization.

21114414012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523 (or 6521 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21114414012 its reverse (21041441112), we get a palindrome (42155855124).

The spelling of 21114414012 in words is "twenty-one billion, one hundred fourteen million, four hundred fourteen thousand, twelve".