21132020333 has 4 divisors (see below), whose sum is σ = 21134120448. Its totient is φ = 21129920220.

The previous prime is 21132020321. The next prime is 21132020341. The reversal of 21132020333 is 33302023112.

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 21132020333 - 2⁴ = 21132020317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132025333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034891 + ... + 1055112.

It is an arithmetic number, because the mean of its divisors is an integer number (5283530112).

Almost surely, 2^21132020333 is an apocalyptic number.

It is an amenable number.

21132020333 is a deficient number, since it is larger than the sum of its proper divisors (2100115).

21132020333 is a wasteful number, since it uses less digits than its factorization.

21132020333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100114.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21132020333 its reverse (33302023112), we get a palindrome (54434043445).

The spelling of 21132020333 in words is "twenty-one billion, one hundred thirty-two million, twenty thousand, three hundred thirty-three".