2113041221 has 2 divisors, whose sum is σ = 2113041222. Its totient is φ = 2113041220.

The previous prime is 2113041173. The next prime is 2113041247. The reversal of 2113041221 is 1221403112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1273490596 + 839550625 = 35686^2 + 28975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113041221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113041221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113041421) 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, 1056520610 + 1056520611.

It is an arithmetic number, because the mean of its divisors is an integer number (1056520611).

Almost surely, 2^2113041221 is an apocalyptic number.

It is an amenable number.

2113041221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113041221 is an equidigital number, since it uses as much as digits as its factorization.

2113041221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2113041221 is about 45967.8281083629. The cubic root of 2113041221 is about 1283.2245402949.

Adding to 2113041221 its reverse (1221403112), we get a palindrome (3334444333).

The spelling of 2113041221 in words is "two billion, one hundred thirteen million, forty-one thousand, two hundred twenty-one".