21120131111203 has 2 divisors, whose sum is σ = 21120131111204. Its totient is φ = 21120131111202.

The previous prime is 21120131111197. The next prime is 21120131111239. The reversal of 21120131111203 is 30211113102112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120131111203 - 2²¹ = 21120129014051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120131111243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560065555601 + 10560065555602.

It is an arithmetic number, because the mean of its divisors is an integer number (10560065555602).

Almost surely, 2^{21120131111203} is an apocalyptic number.

21120131111203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120131111203 is an equidigital number, since it uses as much as digits as its factorization.

21120131111203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21120131111203 its reverse (30211113102112), we get a palindrome (51331244213315).

The spelling of 21120131111203 in words is "twenty-one trillion, one hundred twenty billion, one hundred thirty-one million, one hundred eleven thousand, two hundred three".