2021004311 has 4 divisors (see below), whose sum is σ = 2026044624. Its totient is φ = 2015964000.

The previous prime is 2021004299. The next prime is 2021004313. The reversal of 2021004311 is 1134001202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021004311 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 (2021004313) 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, 2519555 + ... + 2520356.

It is an arithmetic number, because the mean of its divisors is an integer number (506511156).

Almost surely, 2^2021004311 is an apocalyptic number.

2021004311 is a deficient number, since it is larger than the sum of its proper divisors (5040313).

2021004311 is an equidigital number, since it uses as much as digits as its factorization.

2021004311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040312.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2021004311 is about 44955.5815333313. The cubic root of 2021004311 is about 1264.3163279139.

Adding to 2021004311 its reverse (1134001202), we get a palindrome (3155005513).

The spelling of 2021004311 in words is "two billion, twenty-one million, four thousand, three hundred eleven".