21203000133 has 32 divisors (see below), whose sum is σ = 34023475200. Its totient is φ = 11482865856.

The previous prime is 21203000123. The next prime is 21203000197. The reversal of 21203000133 is 33100030212.

It is not a de Polignac number, because 21203000133 - 2⁵ = 21203000101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203000123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148723 + ... + 254016.

It is an arithmetic number, because the mean of its divisors is an integer number (1063233600).

Almost surely, 2^21203000133 is an apocalyptic number.

21203000133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21203000133 is a deficient number, since it is larger than the sum of its proper divisors (12820475067).

21203000133 is a wasteful number, since it uses less digits than its factorization.

21203000133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402881.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21203000133 its reverse (33100030212), we get a palindrome (54303030345).

The spelling of 21203000133 in words is "twenty-one billion, two hundred three million, one hundred thirty-three", and thus it is an aban number.