33103120021 has 2 divisors, whose sum is σ = 33103120022. Its totient is φ = 33103120020.

The previous prime is 33103120019. The next prime is 33103120027. The reversal of 33103120021 is 12002130133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32152076100 + 951043921 = 179310^2 + 30839^2 .

It is a cyclic number.

It is not a de Polignac number, because 33103120021 - 2¹ = 33103120019 is a prime.

Together with 33103120019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 33103119977 and 33103120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33103120027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16551560010 + 16551560011.

It is an arithmetic number, because the mean of its divisors is an integer number (16551560011).

Almost surely, 2^33103120021 is an apocalyptic number.

It is an amenable number.

33103120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33103120021 is an equidigital number, since it uses as much as digits as its factorization.

33103120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 33103120021 its reverse (12002130133), we get a palindrome (45105250154).

The spelling of 33103120021 in words is "thirty-three billion, one hundred three million, one hundred twenty thousand, twenty-one".