2113323221 has 2 divisors, whose sum is σ = 2113323222. Its totient is φ = 2113323220.

The previous prime is 2113323217. The next prime is 2113323271. The reversal of 2113323221 is 1223233112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1847796196 + 265527025 = 42986^2 + 16295^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113323221 - 2² = 2113323217 is a prime.

It is a super-2 number, since 2×2113323221² = 8932270072835629682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2113323193 and 2113323202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113323271) 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 as a sum of consecutive naturals, namely, 1056661610 + 1056661611.

It is an arithmetic number, because the mean of its divisors is an integer number (1056661611).

Almost surely, 2^2113323221 is an apocalyptic number.

It is an amenable number.

2113323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113323221 is an equidigital number, since it uses as much as digits as its factorization.

2113323221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 20.

The square root of 2113323221 is about 45970.8953687004. The cubic root of 2113323221 is about 1283.2816228260.

Adding to 2113323221 its reverse (1223233112), we get a palindrome (3336556333).

The spelling of 2113323221 in words is "two billion, one hundred thirteen million, three hundred twenty-three thousand, two hundred twenty-one".