2321201221 has 16 divisors (see below), whose sum is σ = 2377140480. Its totient is φ = 2266064640.

The previous prime is 2321201213. The next prime is 2321201227. The reversal of 2321201221 is 1221021232.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2321201221 - 2³ = 2321201213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2321201195 and 2321201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321201227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4064866 + ... + 4065436.

It is an arithmetic number, because the mean of its divisors is an integer number (148571280).

Almost surely, 2^2321201221 is an apocalyptic number.

It is an amenable number.

2321201221 is a deficient number, since it is larger than the sum of its proper divisors (55939259).

2321201221 is a wasteful number, since it uses less digits than its factorization.

2321201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2321201221 is about 48178.8461983057. The cubic root of 2321201221 is about 1324.0496274559.

Adding to 2321201221 its reverse (1221021232), we get a palindrome (3542222453).

The spelling of 2321201221 in words is "two billion, three hundred twenty-one million, two hundred one thousand, two hundred twenty-one".