2313212233221 has 6 divisors (see below), whose sum is σ = 3341306559110. Its totient is φ = 1542141488808.

The previous prime is 2313212233201. The next prime is 2313212233223. The reversal of 2313212233221 is 1223322123132.

2313212233221 is a `hidden beast` number, since 2 + 3 + 1 + 321 + 2 + 2 + 332 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1690871112225 + 622341120996 = 1300335^2 + 788886^2 .

It is not a de Polignac number, because 2313212233221 - 2¹⁴ = 2313212216837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313212233223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128511790726 + ... + 128511790743.

Almost surely, 2^{2313212233221} is an apocalyptic number.

It is an amenable number.

2313212233221 is a deficient number, since it is larger than the sum of its proper divisors (1028094325889).

2313212233221 is a wasteful number, since it uses less digits than its factorization.

2313212233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257023581475 (or 257023581472 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 2313212233221 its reverse (1223322123132), we get a palindrome (3536534356353).

The spelling of 2313212233221 in words is "two trillion, three hundred thirteen billion, two hundred twelve million, two hundred thirty-three thousand, two hundred twenty-one".