2021043323021 has 8 divisors (see below), whose sum is σ = 2114992344384. Its totient is φ = 1927600766080.

The previous prime is 2021043323017. The next prime is 2021043323023. The reversal of 2021043323021 is 1203233401202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2021043323021 - 2² = 2021043323017 is a prime.

It is a super-2 number, since 2×2021043323021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021043323023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126607940 + ... + 126623901.

It is an arithmetic number, because the mean of its divisors is an integer number (264374043048).

Almost surely, 2^{2021043323021} is an apocalyptic number.

It is an amenable number.

2021043323021 is a deficient number, since it is larger than the sum of its proper divisors (93949021363).

2021043323021 is a wasteful number, since it uses less digits than its factorization.

2021043323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253232211.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 2021043323021 its reverse (1203233401202), we get a palindrome (3224276724223).

The spelling of 2021043323021 in words is "two trillion, twenty-one billion, forty-three million, three hundred twenty-three thousand, twenty-one".