221012522186429 has 2 divisors, whose sum is σ = 221012522186430. Its totient is φ = 221012522186428.

The previous prime is 221012522186399. The next prime is 221012522186513. The reversal of 221012522186429 is 924681225210122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141352434623929 + 79660087562500 = 11889173^2 + 8925250^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012522186429 - 2¹⁶ = 221012522120893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012522186629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506261093214 + 110506261093215.

It is an arithmetic number, because the mean of its divisors is an integer number (110506261093215).

Almost surely, 2^{221012522186429} is an apocalyptic number.

It is an amenable number.

221012522186429 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012522186429 is an equidigital number, since it uses as much as digits as its factorization.

221012522186429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 221012522186429 in words is "two hundred twenty-one trillion, twelve billion, five hundred twenty-two million, one hundred eighty-six thousand, four hundred twenty-nine".