133421003 has 2 divisors, whose sum is σ = 133421004. Its totient is φ = 133421002.

The previous prime is 133420979. The next prime is 133421009. The reversal of 133421003 is 300124331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133421003 - 2⁸ = 133420747 is a prime.

It is not a weakly prime, because it can be changed into another prime (133421009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66710501 + 66710502.

It is an arithmetic number, because the mean of its divisors is an integer number (66710502).

Almost surely, 2^133421003 is an apocalyptic number.

133421003 is a deficient number, since it is larger than the sum of its proper divisors (1).

133421003 is an equidigital number, since it uses as much as digits as its factorization.

133421003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133421003 is about 11550.8009678983. The cubic root of 133421003 is about 510.9849005512.

Adding to 133421003 its reverse (300124331), we get a palindrome (433545334).

The spelling of 133421003 in words is "one hundred thirty-three million, four hundred twenty-one thousand, three".