21100211221002 has 32 divisors (see below), whose sum is σ = 43346981428800. Its totient is φ = 6842363269248.

The previous prime is 21100211220989. The next prime is 21100211221009. The reversal of 21100211221002 is 20012211200112.

It is not an unprimeable number, because it can be changed into a prime (21100211221009) 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 15 ways as a sum of consecutive naturals, for example, 4980427 + ... + 8185662.

It is an arithmetic number, because the mean of its divisors is an integer number (1354593169650).

Almost surely, 2^{21100211221002} is an apocalyptic number.

21100211221002 is an abundant number, since it is smaller than the sum of its proper divisors (22246770207798).

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

21100211221002 is a wasteful number, since it uses less digits than its factorization.

21100211221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13173350.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100211221002 its reverse (20012211200112), we get a palindrome (41112422421114).

The spelling of 21100211221002 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred twenty-one thousand, two".