221220506047 has 2 divisors, whose sum is σ = 221220506048. Its totient is φ = 221220506046.

The previous prime is 221220506021. The next prime is 221220506069. The reversal of 221220506047 is 740605022122.

221220506047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221220506047 - 2³⁵ = 186860767679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220506147) 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, 110610253023 + 110610253024.

It is an arithmetic number, because the mean of its divisors is an integer number (110610253024).

Almost surely, 2^221220506047 is an apocalyptic number.

221220506047 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220506047 is an equidigital number, since it uses as much as digits as its factorization.

221220506047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 221220506047 its reverse (740605022122), we get a palindrome (961825528169).

The spelling of 221220506047 in words is "two hundred twenty-one billion, two hundred twenty million, five hundred six thousand, forty-seven".