21132301033 has 4 divisors (see below), whose sum is σ = 21531023748. Its totient is φ = 20733578320.

The previous prime is 21132300997. The next prime is 21132301037. The reversal of 21132301033 is 33010323112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6198727824 + 14933573209 = 78732^2 + 122203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132301033 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 21132301033.

It is not an unprimeable number, because it can be changed into a prime (21132301037) 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 3 ways as a sum of consecutive naturals, for example, 199361278 + ... + 199361383.

It is an arithmetic number, because the mean of its divisors is an integer number (5382755937).

Almost surely, 2^21132301033 is an apocalyptic number.

It is an amenable number.

21132301033 is a deficient number, since it is larger than the sum of its proper divisors (398722715).

21132301033 is an equidigital number, since it uses as much as digits as its factorization.

21132301033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398722714.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21132301033 its reverse (33010323112), we get a palindrome (54142624145).

The spelling of 21132301033 in words is "twenty-one billion, one hundred thirty-two million, three hundred one thousand, thirty-three".