21033233211331 has 16 divisors (see below), whose sum is σ = 24061722564960. Its totient is φ = 18208871089920.

The previous prime is 21033233211313. The next prime is 21033233211337. The reversal of 21033233211331 is 13311233233012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21033233211331 - 2³⁵ = 20998873472963 is a prime.

It is a super-2 number, since 2×21033233211331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21033233211331.

It is not an unprimeable number, because it can be changed into a prime (21033233211337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451585620 + ... + 451632193.

It is an arithmetic number, because the mean of its divisors is an integer number (1503857660310).

Almost surely, 2^{21033233211331} is an apocalyptic number.

21033233211331 is a deficient number, since it is larger than the sum of its proper divisors (3028489353629).

21033233211331 is a wasteful number, since it uses less digits than its factorization.

21033233211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903217926.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21033233211331 its reverse (13311233233012), we get a palindrome (34344466444343).

The spelling of 21033233211331 in words is "twenty-one trillion, thirty-three billion, two hundred thirty-three million, two hundred eleven thousand, three hundred thirty-one".