21242241121203 has 6 divisors (see below), whose sum is σ = 30683237175084. Its totient is φ = 14161494080796.

The previous prime is 21242241121187. The next prime is 21242241121223. The reversal of 21242241121203 is 30212114224212.

21242241121203 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 22 + 411 + 21 + 203 = 666.

It is not a de Polignac number, because 21242241121203 - 2⁴ = 21242241121187 is a prime.

It is a super-4 number, since 4×21242241121203⁴ (a number of 54 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21242241121223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1180124506725 + ... + 1180124506742.

It is an arithmetic number, because the mean of its divisors is an integer number (5113872862514).

Almost surely, 2^{21242241121203} is an apocalyptic number.

21242241121203 is a deficient number, since it is larger than the sum of its proper divisors (9440996053881).

21242241121203 is a wasteful number, since it uses less digits than its factorization.

21242241121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360249013473 (or 2360249013470 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21242241121203 its reverse (30212114224212), we get a palindrome (51454355345415).

The spelling of 21242241121203 in words is "twenty-one trillion, two hundred forty-two billion, two hundred forty-one million, one hundred twenty-one thousand, two hundred three".