21331433314433 has 8 divisors (see below), whose sum is σ = 23270688141120. Its totient is φ = 19392184090480.

The previous prime is 21331433314427. The next prime is 21331433314463. The reversal of 21331433314433 is 33441333413312.

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 21331433314433 - 2¹⁰ = 21331433313409 is a prime.

It is a super-2 number, since 2×21331433314433² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331433314423) 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, 12975323 + ... + 14526591.

It is an arithmetic number, because the mean of its divisors is an integer number (2908836017640).

Almost surely, 2^{21331433314433} is an apocalyptic number.

It is an amenable number.

21331433314433 is a deficient number, since it is larger than the sum of its proper divisors (1939254826687).

21331433314433 is a wasteful number, since it uses less digits than its factorization.

21331433314433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801367.

The product of its digits is 279936, while the sum is 38.

Adding to 21331433314433 its reverse (33441333413312), we get a palindrome (54772766727745).

The spelling of 21331433314433 in words is "twenty-one trillion, three hundred thirty-one billion, four hundred thirty-three million, three hundred fourteen thousand, four hundred thirty-three".