2321023021 has 4 divisors (see below), whose sum is σ = 2321172700. Its totient is φ = 2320873344.

The previous prime is 2321023013. The next prime is 2321023027. The reversal of 2321023021 is 1203201232.

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 824493796 + 1496529225 = 28714^2 + 38685^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321023021 - 2³ = 2321023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2321022986 and 2321023004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321023027) 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, 48486 + ... + 83623.

It is an arithmetic number, because the mean of its divisors is an integer number (580293175).

Almost surely, 2^2321023021 is an apocalyptic number.

It is an amenable number.

2321023021 is a deficient number, since it is larger than the sum of its proper divisors (149679).

2321023021 is a wasteful number, since it uses less digits than its factorization.

2321023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149678.

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

The square root of 2321023021 is about 48176.9968034538. The cubic root of 2321023021 is about 1324.0157438960.

Adding to 2321023021 its reverse (1203201232), we get a palindrome (3524224253).

The spelling of 2321023021 in words is "two billion, three hundred twenty-one million, twenty-three thousand, twenty-one".