21033201329 has 16 divisors (see below), whose sum is σ = 25637741568. Its totient is φ = 16844093952.

The previous prime is 21033201323. The next prime is 21033201347. The reversal of 21033201329 is 92310233012.

It is not a de Polignac number, because 21033201329 - 2¹² = 21033197233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033201298 and 21033201307.

It is not an unprimeable number, because it can be changed into a prime (21033201323) 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 15 ways as a sum of consecutive naturals, for example, 628769 + ... + 661374.

It is an arithmetic number, because the mean of its divisors is an integer number (1602358848).

Almost surely, 2^21033201329 is an apocalyptic number.

It is an amenable number.

21033201329 is a deficient number, since it is larger than the sum of its proper divisors (4604540239).

21033201329 is a wasteful number, since it uses less digits than its factorization.

21033201329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290304.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 21033201329 in words is "twenty-one billion, thirty-three million, two hundred one thousand, three hundred twenty-nine".