21033023102033 has 4 divisors (see below), whose sum is σ = 21037222153380. Its totient is φ = 21028824050688.

The previous prime is 21033023102029. The next prime is 21033023102051. The reversal of 21033023102033 is 33020132033012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16901365210129 + 4131657891904 = 4111127^2 + 2032648^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033023102033 - 2² = 21033023102029 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033023102093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099518160 + ... + 2099528177.

It is an arithmetic number, because the mean of its divisors is an integer number (5259305538345).

Almost surely, 2^{21033023102033} is an apocalyptic number.

It is an amenable number.

21033023102033 is a deficient number, since it is larger than the sum of its proper divisors (4199051347).

21033023102033 is an equidigital number, since it uses as much as digits as its factorization.

21033023102033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199051346.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21033023102033 its reverse (33020132033012), we get a palindrome (54053155135045).

The spelling of 21033023102033 in words is "twenty-one trillion, thirty-three billion, twenty-three million, one hundred two thousand, thirty-three".