2042021321 has 4 divisors (see below), whose sum is σ = 2043094032. Its totient is φ = 2040948612.

The previous prime is 2042021297. The next prime is 2042021323. The reversal of 2042021321 is 1231202402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2042021321 - 2²² = 2037827017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2042021321.

It is not an unprimeable number, because it can be changed into a prime (2042021323) 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, 533495 + ... + 537308.

It is an arithmetic number, because the mean of its divisors is an integer number (510773508).

Almost surely, 2^2042021321 is an apocalyptic number.

It is an amenable number.

2042021321 is a deficient number, since it is larger than the sum of its proper divisors (1072711).

2042021321 is a wasteful number, since it uses less digits than its factorization.

2042021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072710.

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

The square root of 2042021321 is about 45188.7300219867. The cubic root of 2042021321 is about 1268.6838869479.

Adding to 2042021321 its reverse (1231202402), we get a palindrome (3273223723).

The spelling of 2042021321 in words is "two billion, forty-two million, twenty-one thousand, three hundred twenty-one".