21033321331331 has 8 divisors (see below), whose sum is σ = 21950599361280. Its totient is φ = 20116275451272.

The previous prime is 21033321331313. The next prime is 21033321331343. The reversal of 21033321331331 is 13313312333012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033321331331 is a prime.

It is a super-2 number, since 2×21033321331331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033321331294 and 21033321331303.

It is not an unprimeable number, because it can be changed into a prime (21033321331931) 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, 57852305 + ... + 58214738.

It is an arithmetic number, because the mean of its divisors is an integer number (2743824920160).

Almost surely, 2^{21033321331331} is an apocalyptic number.

21033321331331 is a deficient number, since it is larger than the sum of its proper divisors (917278029949).

21033321331331 is a wasteful number, since it uses less digits than its factorization.

21033321331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116074945.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 21033321331331 its reverse (13313312333012), we get a palindrome (34346633664343).

The spelling of 21033321331331 in words is "twenty-one trillion, thirty-three billion, three hundred twenty-one million, three hundred thirty-one thousand, three hundred thirty-one".