221012221111247 has 2 divisors, whose sum is σ = 221012221111248. Its totient is φ = 221012221111246.

The previous prime is 221012221111189. The next prime is 221012221111337. The reversal of 221012221111247 is 742111122210122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221012221111247 - 2²⁶ = 221012154002383 is a prime.

It is a super-2 number, since 2×221012221111247² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012221191247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506110555623 + 110506110555624.

It is an arithmetic number, because the mean of its divisors is an integer number (110506110555624).

Almost surely, 2^{221012221111247} is an apocalyptic number.

221012221111247 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012221111247 is an equidigital number, since it uses as much as digits as its factorization.

221012221111247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 221012221111247 its reverse (742111122210122), we get a palindrome (963123343321369).

The spelling of 221012221111247 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, one hundred eleven thousand, two hundred forty-seven".