21033303201023 has 4 divisors (see below), whose sum is σ = 21038686696920. Its totient is φ = 21027919705128.

The previous prime is 21033303201011. The next prime is 21033303201037. The reversal of 21033303201023 is 32010230333012.

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

It is a cyclic number.

It is not a de Polignac number, because 21033303201023 - 2¹⁰ = 21033303199999 is a prime.

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 21033303201023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033303201073) 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, 2691742088 + ... + 2691749901.

It is an arithmetic number, because the mean of its divisors is an integer number (5259671674230).

Almost surely, 2^{21033303201023} is an apocalyptic number.

21033303201023 is a deficient number, since it is larger than the sum of its proper divisors (5383495897).

21033303201023 is an equidigital number, since it uses as much as digits as its factorization.

21033303201023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383495896.

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

Adding to 21033303201023 its reverse (32010230333012), we get a palindrome (53043533534035).

The spelling of 21033303201023 in words is "twenty-one trillion, thirty-three billion, three hundred three million, two hundred one thousand, twenty-three".