20201121020023 has 4 divisors (see below), whose sum is σ = 20201666193520. Its totient is φ = 20200575846528.

The previous prime is 20201121019921. The next prime is 20201121020039. The reversal of 20201121020023 is 32002012110202.

It is a happy number.

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 20201121020023 - 2⁹ = 20201121019511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201121019979 and 20201121020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201121020083) 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, 272531163 + ... + 272605276.

It is an arithmetic number, because the mean of its divisors is an integer number (5050416548380).

Almost surely, 2^{20201121020023} is an apocalyptic number.

20201121020023 is a deficient number, since it is larger than the sum of its proper divisors (545173497).

20201121020023 is an equidigital number, since it uses as much as digits as its factorization.

20201121020023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545173496.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20201121020023 its reverse (32002012110202), we get a palindrome (52203133130225).

The spelling of 20201121020023 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, twenty thousand, twenty-three".