21011122103203 has 2 divisors, whose sum is σ = 21011122103204. Its totient is φ = 21011122103202.

The previous prime is 21011122103161. The next prime is 21011122103219. The reversal of 21011122103203 is 30230122111012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011122103203 - 2²⁹ = 21010585232291 is a prime.

It is not a weakly prime, because it can be changed into another prime (21011122106203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505561051601 + 10505561051602.

It is an arithmetic number, because the mean of its divisors is an integer number (10505561051602).

Almost surely, 2^{21011122103203} is an apocalyptic number.

21011122103203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011122103203 is an equidigital number, since it uses as much as digits as its factorization.

21011122103203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21011122103203 its reverse (30230122111012), we get a palindrome (51241244214215).

The spelling of 21011122103203 in words is "twenty-one trillion, eleven billion, one hundred twenty-two million, one hundred three thousand, two hundred three".