21112021111204 has 12 divisors (see below), whose sum is σ = 36946230163164. Its totient is φ = 10555955350304.

The previous prime is 21112021111199. The next prime is 21112021111213. The reversal of 21112021111204 is 40211112021112.

It can be written as a sum of positive squares in 2 ways, for example, as 882697830400 + 20229323280804 = 939520^2 + 4497702^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12934819 + ... + 14475274.

It is an arithmetic number, because the mean of its divisors is an integer number (3078852513597).

Almost surely, 2^{21112021111204} is an apocalyptic number.

It is an amenable number.

21112021111204 is a deficient number, since it is larger than the sum of its proper divisors (15834209051960).

21112021111204 is a wasteful number, since it uses less digits than its factorization.

21112021111204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27602654 (or 27602652 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21112021111204 its reverse (40211112021112), we get a palindrome (61323133132316).

The spelling of 21112021111204 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred eleven thousand, two hundred four".