21113224002 has 96 divisors (see below), whose sum is σ = 50925288960. Its totient is φ = 6277927680.

The previous prime is 21113223983. The next prime is 21113224007. The reversal of 21113224002 is 20042231112.

It is a happy number.

It is a super-3 number, since 3×21113224002³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21113224007) 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 47 ways as a sum of consecutive naturals, for example, 6577774 + ... + 6580982.

It is an arithmetic number, because the mean of its divisors is an integer number (530471760).

Almost surely, 2^21113224002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21113224002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25462644480).

21113224002 is an abundant number, since it is smaller than the sum of its proper divisors (29812064958).

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

21113224002 is a wasteful number, since it uses less digits than its factorization.

21113224002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21113224002 its reverse (20042231112), we get a palindrome (41155455114).

The spelling of 21113224002 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty-four thousand, two".