2321201021 has 4 divisors (see below), whose sum is σ = 2331337500. Its totient is φ = 2311064544.

The previous prime is 2321200993. The next prime is 2321201023. The reversal of 2321201021 is 1201021232.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1763580025 + 557620996 = 41995^2 + 23614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321201021 - 2¹⁴ = 2321184637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2321200987 and 2321201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321201023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5067896 + ... + 5068353.

It is an arithmetic number, because the mean of its divisors is an integer number (582834375).

Almost surely, 2^2321201021 is an apocalyptic number.

It is an amenable number.

2321201021 is a deficient number, since it is larger than the sum of its proper divisors (10136479).

2321201021 is a wasteful number, since it uses less digits than its factorization.

2321201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10136478.

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

The square root of 2321201021 is about 48178.8441227060. The cubic root of 2321201021 is about 1324.0495894282.

Adding to 2321201021 its reverse (1201021232), we get a palindrome (3522222253).

It can be divided in two parts, 232 and 1201021, that multiplied together give a palindrome (278636872).

The spelling of 2321201021 in words is "two billion, three hundred twenty-one million, two hundred one thousand, twenty-one".