21331004133 has 16 divisors (see below), whose sum is σ = 30190242240. Its totient is φ = 13350433536.

The previous prime is 21331004131. The next prime is 21331004141. The reversal of 21331004133 is 33140013312.

It is not a de Polignac number, because 21331004133 - 2¹ = 21331004131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331004131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506523 + ... + 547016.

It is an arithmetic number, because the mean of its divisors is an integer number (1886890140).

Almost surely, 2^21331004133 is an apocalyptic number.

It is an amenable number.

21331004133 is a deficient number, since it is larger than the sum of its proper divisors (8859238107).

21331004133 is a wasteful number, since it uses less digits than its factorization.

21331004133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053956.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21331004133 its reverse (33140013312), we get a palindrome (54471017445).

The spelling of 21331004133 in words is "twenty-one billion, three hundred thirty-one million, four thousand, one hundred thirty-three".