2021042311 has 4 divisors (see below), whose sum is σ = 2024166672. Its totient is φ = 2017917952.

The previous prime is 2021042291. The next prime is 2021042339. The reversal of 2021042311 is 1132401202.

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 2021042311 - 2⁵ = 2021042279 is a prime.

It is a super-2 number, since 2×2021042311² = 8169224045704441442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021042341) 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, 1561210 + ... + 1562503.

It is an arithmetic number, because the mean of its divisors is an integer number (506041668).

Almost surely, 2^2021042311 is an apocalyptic number.

2021042311 is a deficient number, since it is larger than the sum of its proper divisors (3124361).

2021042311 is an equidigital number, since it uses as much as digits as its factorization.

2021042311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124360.

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

The square root of 2021042311 is about 44956.0041707445. The cubic root of 2021042311 is about 1264.3242519807.

Adding to 2021042311 its reverse (1132401202), we get a palindrome (3153443513).

The spelling of 2021042311 in words is "two billion, twenty-one million, forty-two thousand, three hundred eleven".