133203330021 has 4 divisors (see below), whose sum is σ = 177604440032. Its totient is φ = 88802220012.

The previous prime is 133203329999. The next prime is 133203330101. The reversal of 133203330021 is 120033302331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133203330021 - 2⁶ = 133203329957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133203330021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133203330721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22200555001 + ... + 22200555006.

It is an arithmetic number, because the mean of its divisors is an integer number (44401110008).

Almost surely, 2^133203330021 is an apocalyptic number.

It is an amenable number.

133203330021 is a deficient number, since it is larger than the sum of its proper divisors (44401110011).

133203330021 is an equidigital number, since it uses as much as digits as its factorization.

133203330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44401110010.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 133203330021 its reverse (120033302331), we get a palindrome (253236632352).

The spelling of 133203330021 in words is "one hundred thirty-three billion, two hundred three million, three hundred thirty thousand, twenty-one".