2013123332221 has 2 divisors, whose sum is σ = 2013123332222. Its totient is φ = 2013123332220.

The previous prime is 2013123332183. The next prime is 2013123332291. The reversal of 2013123332221 is 1222333213102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1806994620025 + 206128712196 = 1344245^2 + 454014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013123332221 - 2¹¹ = 2013123330173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013123332291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006561666110 + 1006561666111.

It is an arithmetic number, because the mean of its divisors is an integer number (1006561666111).

Almost surely, 2^{2013123332221} is an apocalyptic number.

It is an amenable number.

2013123332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013123332221 is an equidigital number, since it uses as much as digits as its factorization.

2013123332221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2013123332221 its reverse (1222333213102), we get a palindrome (3235456545323).

The spelling of 2013123332221 in words is "two trillion, thirteen billion, one hundred twenty-three million, three hundred thirty-two thousand, two hundred twenty-one".