21331640161133 has 8 divisors (see below), whose sum is σ = 21387197180160. Its totient is φ = 21276111215440.

The previous prime is 21331640161093. The next prime is 21331640161147. The reversal of 21331640161133 is 33116104613312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21331640161133 - 2²⁰ = 21331639112557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331640161093 and 21331640161102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331640161033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5496218 + ... + 8536491.

It is an arithmetic number, because the mean of its divisors is an integer number (2673399647520).

Almost surely, 2^{21331640161133} is an apocalyptic number.

It is an amenable number.

21331640161133 is a deficient number, since it is larger than the sum of its proper divisors (55557019027).

21331640161133 is a wasteful number, since it uses less digits than its factorization.

21331640161133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14036667.

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 21331640161133 its reverse (33116104613312), we get a palindrome (54447744774445).

The spelling of 21331640161133 in words is "twenty-one trillion, three hundred thirty-one billion, six hundred forty million, one hundred sixty-one thousand, one hundred thirty-three".