21230000133 has 4 divisors (see below), whose sum is σ = 28306666848. Its totient is φ = 14153333420.

The previous prime is 21230000131. The next prime is 21230000137. The reversal of 21230000133 is 33100003212.

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 a cyclic number.

It is not a de Polignac number, because 21230000133 - 2¹ = 21230000131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230000131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538333353 + ... + 3538333358.

It is an arithmetic number, because the mean of its divisors is an integer number (7076666712).

Almost surely, 2^21230000133 is an apocalyptic number.

It is an amenable number.

21230000133 is a deficient number, since it is larger than the sum of its proper divisors (7076666715).

21230000133 is an equidigital number, since it uses as much as digits as its factorization.

21230000133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7076666714.

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

Adding to 21230000133 its reverse (33100003212), we get a palindrome (54330003345).

The spelling of 21230000133 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three", and thus it is an aban number.