21133313123203 has 2 divisors, whose sum is σ = 21133313123204. Its totient is φ = 21133313123202.

The previous prime is 21133313123119. The next prime is 21133313123231. The reversal of 21133313123203 is 30232131333112.

It is a happy number.

It is an a-pointer prime, because the next prime (21133313123231) can be obtained adding 21133313123203 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21133313123203 - 2³⁷ = 20995874169731 is a prime.

It is not a weakly prime, because it can be changed into another prime (21133313123233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566656561601 + 10566656561602.

It is an arithmetic number, because the mean of its divisors is an integer number (10566656561602).

Almost surely, 2^{21133313123203} is an apocalyptic number.

21133313123203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133313123203 is an equidigital number, since it uses as much as digits as its factorization.

21133313123203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21133313123203 its reverse (30232131333112), we get a palindrome (51365444456315).

The spelling of 21133313123203 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred thirteen million, one hundred twenty-three thousand, two hundred three".