21000032331333 has 64 divisors (see below), whose sum is σ = 32697712115712. Its totient is φ = 11861477369280.

The previous prime is 21000032331331. The next prime is 21000032331337. The reversal of 21000032331333 is 33313323000012.

It is not a de Polignac number, because 21000032331333 - 2¹ = 21000032331331 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000032331331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6635166 + ... + 9274992.

It is an arithmetic number, because the mean of its divisors is an integer number (510901751808).

Almost surely, 2^{21000032331333} is an apocalyptic number.

21000032331333 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21000032331333 is a deficient number, since it is larger than the sum of its proper divisors (11697679784379).

21000032331333 is a wasteful number, since it uses less digits than its factorization.

21000032331333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640134.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21000032331333 its reverse (33313323000012), we get a palindrome (54313355331345).

The spelling of 21000032331333 in words is "twenty-one trillion, thirty-two million, three hundred thirty-one thousand, three hundred thirty-three".