20033012021021 has 4 divisors (see below), whose sum is σ = 20033101945344. Its totient is φ = 20032922096700.

The previous prime is 20033012020999. The next prime is 20033012021039. The reversal of 20033012021021 is 12012021033002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20033012021021 - 2²⁶ = 20032944912157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033012021221) 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, 44627165 + ... + 45073826.

It is an arithmetic number, because the mean of its divisors is an integer number (5008275486336).

Almost surely, 2^{20033012021021} is an apocalyptic number.

It is an amenable number.

20033012021021 is a deficient number, since it is larger than the sum of its proper divisors (89924323).

20033012021021 is an equidigital number, since it uses as much as digits as its factorization.

20033012021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89924322.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20033012021021 its reverse (12012021033002), we get a palindrome (32045033054023).

The spelling of 20033012021021 in words is "twenty trillion, thirty-three billion, twelve million, twenty-one thousand, twenty-one".