21012221113002 has 24 divisors (see below), whose sum is σ = 52030261803936. Its totient is φ = 6003491746536.

The previous prime is 21012221112941. The next prime is 21012221113027. The reversal of 21012221113002 is 20031112221012.

21012221113002 is a `hidden beast` number, since 210 + 122 + 21 + 11 + 300 + 2 = 666.

It is a super-2 number, since 2×21012221113002² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83381829688 + ... + 83381829939.

It is an arithmetic number, because the mean of its divisors is an integer number (2167927575164).

Almost surely, 2^{21012221113002} is an apocalyptic number.

21012221113002 is an abundant number, since it is smaller than the sum of its proper divisors (31018040690934).

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

21012221113002 is a wasteful number, since it uses less digits than its factorization.

21012221113002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166763659642 (or 166763659639 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21012221113002 its reverse (20031112221012), we get a palindrome (41043333334014).

The spelling of 21012221113002 in words is "twenty-one trillion, twelve billion, two hundred twenty-one million, one hundred thirteen thousand, two".