133103021 has 2 divisors, whose sum is σ = 133103022. Its totient is φ = 133103020.

The previous prime is 133102993. The next prime is 133103053. The reversal of 133103021 is 120301331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114276100 + 18826921 = 10690^2 + 4339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133103021 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133102987 and 133103005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133103521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66551510 + 66551511.

It is an arithmetic number, because the mean of its divisors is an integer number (66551511).

Almost surely, 2^133103021 is an apocalyptic number.

It is an amenable number.

133103021 is a deficient number, since it is larger than the sum of its proper divisors (1).

133103021 is an equidigital number, since it uses as much as digits as its factorization.

133103021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 133103021 is about 11537.0282568779. The cubic root of 133103021 is about 510.5786345442.

Adding to 133103021 its reverse (120301331), we get a palindrome (253404352).

The spelling of 133103021 in words is "one hundred thirty-three million, one hundred three thousand, twenty-one".