21403103233 has 2 divisors, whose sum is σ = 21403103234. Its totient is φ = 21403103232.

The previous prime is 21403103221. The next prime is 21403103243. The reversal of 21403103233 is 33230130412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17257288689 + 4145814544 = 131367^2 + 64388^2 .

It is a cyclic number.

It is not a de Polignac number, because 21403103233 - 2⁵ = 21403103201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21403103243) 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 as a sum of consecutive naturals, namely, 10701551616 + 10701551617.

It is an arithmetic number, because the mean of its divisors is an integer number (10701551617).

Almost surely, 2^21403103233 is an apocalyptic number.

It is an amenable number.

21403103233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403103233 is an equidigital number, since it uses as much as digits as its factorization.

21403103233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21403103233 its reverse (33230130412), we get a palindrome (54633233645).

The spelling of 21403103233 in words is "twenty-one billion, four hundred three million, one hundred three thousand, two hundred thirty-three".