2021340031 has 4 divisors (see below), whose sum is σ = 2021591952. Its totient is φ = 2021088112.

The previous prime is 2021339993. The next prime is 2021340037. The reversal of 2021340031 is 1300431202.

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 2021340031 - 2¹⁵ = 2021307263 is a prime.

It is a super-2 number, since 2×2021340031² = 8171631041846161922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021339987 and 2021340014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021340037) 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, 113515 + ... + 130108.

It is an arithmetic number, because the mean of its divisors is an integer number (505397988).

Almost surely, 2^2021340031 is an apocalyptic number.

2021340031 is a deficient number, since it is larger than the sum of its proper divisors (251921).

2021340031 is an equidigital number, since it uses as much as digits as its factorization.

2021340031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251920.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2021340031 is about 44959.3152861562. The cubic root of 2021340031 is about 1264.3863315213.

Adding to 2021340031 its reverse (1300431202), we get a palindrome (3321771233).

The spelling of 2021340031 in words is "two billion, twenty-one million, three hundred forty thousand, thirty-one".