21112011120203 has 2 divisors, whose sum is σ = 21112011120204. Its totient is φ = 21112011120202.

The previous prime is 21112011120157. The next prime is 21112011120251. The reversal of 21112011120203 is 30202111021112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112011120203 - 2²⁰ = 21112010071627 is a prime.

It is a super-2 number, since 2×21112011120203² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21112011120293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556005560101 + 10556005560102.

It is an arithmetic number, because the mean of its divisors is an integer number (10556005560102).

Almost surely, 2^{21112011120203} is an apocalyptic number.

21112011120203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112011120203 is an equidigital number, since it uses as much as digits as its factorization.

21112011120203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21112011120203 its reverse (30202111021112), we get a palindrome (51314122141315).

Subtracting 21112011120203 from its reverse (30202111021112), we obtain a palindrome (9090099900909).

The spelling of 21112011120203 in words is "twenty-one trillion, one hundred twelve billion, eleven million, one hundred twenty thousand, two hundred three".