2021021202023 has 16 divisors (see below), whose sum is σ = 2149052446080. Its totient is φ = 1894007808000.

The previous prime is 2021021202001. The next prime is 2021021202043. The reversal of 2021021202023 is 3202021201202.

It is not a de Polignac number, because 2021021202023 - 2⁶ = 2021021201959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021021201992 and 2021021202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021021202043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80438903 + ... + 80464023.

It is an arithmetic number, because the mean of its divisors is an integer number (134315777880).

Almost surely, 2^{2021021202023} is an apocalyptic number.

2021021202023 is a deficient number, since it is larger than the sum of its proper divisors (128031244057).

2021021202023 is a wasteful number, since it uses less digits than its factorization.

2021021202023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45178.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2021021202023 its reverse (3202021201202), we get a palindrome (5223042403225).

The spelling of 2021021202023 in words is "two trillion, twenty-one billion, twenty-one million, two hundred two thousand, twenty-three".