2321021 has 8 divisors (see below), whose sum is σ = 2462400. Its totient is φ = 2181600.

The previous prime is 2321017. The next prime is 2321023. The reversal of 2321021 is 1201232.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2321021 - 2² = 2321017 is a prime.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 2320993 and 2321011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2465 + ... + 3273.

It is an arithmetic number, because the mean of its divisors is an integer number (307800).

2^2321021 is an apocalyptic number.

It is an amenable number.

2321021 is a deficient number, since it is larger than the sum of its proper divisors (141379).

2321021 is a wasteful number, since it uses less digits than its factorization.

2321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2321021 is about 1523.4897439760. The cubic root of 2321021 is about 132.4015359606.

Adding to 2321021 its reverse (1201232), we get a palindrome (3522253).

The spelling of 2321021 in words is "two million, three hundred twenty-one thousand, twenty-one".