21202112111203 has 16 divisors (see below), whose sum is σ = 21345088010400. Its totient is φ = 21059610773760.

The previous prime is 21202112111101. The next prime is 21202112111207. The reversal of 21202112111203 is 30211121120212.

It is a cyclic number.

It is not a de Polignac number, because 21202112111203 - 2⁹ = 21202112110691 is a prime.

It is a super-3 number, since 3×21202112111203³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202112111207) 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, 275446000 + ... + 275522962.

It is an arithmetic number, because the mean of its divisors is an integer number (1334068000650).

Almost surely, 2^{21202112111203} is an apocalyptic number.

21202112111203 is a deficient number, since it is larger than the sum of its proper divisors (142975899197).

21202112111203 is a wasteful number, since it uses less digits than its factorization.

21202112111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80022.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21202112111203 its reverse (30211121120212), we get a palindrome (51413233231415).

Subtracting 21202112111203 from its reverse (30211121120212), we obtain a palindrome (9009009009009).

The spelling of 21202112111203 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, one hundred eleven thousand, two hundred three".