21621210432333 has 32 divisors (see below), whose sum is σ = 31611828019200. Its totient is φ = 13093762622400.

The previous prime is 21621210432323. The next prime is 21621210432337. The reversal of 21621210432333 is 33323401212612.

It is not a de Polignac number, because 21621210432333 - 2¹³ = 21621210424141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21621210432294 and 21621210432303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621210432337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55936353 + ... + 56321558.

It is an arithmetic number, because the mean of its divisors is an integer number (987869625600).

Almost surely, 2^{21621210432333} is an apocalyptic number.

It is an amenable number.

21621210432333 is a deficient number, since it is larger than the sum of its proper divisors (9990617586867).

21621210432333 is a wasteful number, since it uses less digits than its factorization.

21621210432333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112258073.

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 21621210432333 its reverse (33323401212612), we get a palindrome (54944611644945).

The spelling of 21621210432333 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred ten million, four hundred thirty-two thousand, three hundred thirty-three".