221201162543 has 2 divisors, whose sum is σ = 221201162544. Its totient is φ = 221201162542.

The previous prime is 221201162521. The next prime is 221201162551. The reversal of 221201162543 is 345261102122.

221201162543 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 221201162543 - 2²⁴ = 221184385327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221201162593) 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, 110600581271 + 110600581272.

It is an arithmetic number, because the mean of its divisors is an integer number (110600581272).

Almost surely, 2^221201162543 is an apocalyptic number.

221201162543 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201162543 is an equidigital number, since it uses as much as digits as its factorization.

221201162543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 221201162543 its reverse (345261102122), we get a palindrome (566462264665).

The spelling of 221201162543 in words is "two hundred twenty-one billion, two hundred one million, one hundred sixty-two thousand, five hundred forty-three".