221012413 has 2 divisors, whose sum is σ = 221012414. Its totient is φ = 221012412.

The previous prime is 221012399. The next prime is 221012417. The reversal of 221012413 is 314210122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160452889 + 60559524 = 12667^2 + 7782^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012413 - 2²¹ = 218915261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506206 + 110506207.

It is an arithmetic number, because the mean of its divisors is an integer number (110506207).

Almost surely, 2^221012413 is an apocalyptic number.

It is an amenable number.

221012413 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012413 is an equidigital number, since it uses as much as digits as its factorization.

221012413 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 16.

The square root of 221012413 is about 14866.4862358259. The cubic root of 221012413 is about 604.6056788913.

Adding to 221012413 its reverse (314210122), we get a palindrome (535222535).

The spelling of 221012413 in words is "two hundred twenty-one million, twelve thousand, four hundred thirteen".