21124220223341 has 4 divisors (see below), whose sum is σ = 21128921812572. Its totient is φ = 21119518634112.

The previous prime is 21124220223257. The next prime is 21124220223367. The reversal of 21124220223341 is 14332202242112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13330932834025 + 7793287389316 = 3651155^2 + 2791646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21124220223341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124220223241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2350787876 + ... + 2350796861.

It is an arithmetic number, because the mean of its divisors is an integer number (5282230453143).

Almost surely, 2^{21124220223341} is an apocalyptic number.

It is an amenable number.

21124220223341 is a deficient number, since it is larger than the sum of its proper divisors (4701589231).

21124220223341 is an equidigital number, since it uses as much as digits as its factorization.

21124220223341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701589230.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21124220223341 its reverse (14332202242112), we get a palindrome (35456422465453).

The spelling of 21124220223341 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred twenty million, two hundred twenty-three thousand, three hundred forty-one".