221601655043 has 2 divisors, whose sum is σ = 221601655044. Its totient is φ = 221601655042.

The previous prime is 221601655013. The next prime is 221601655081. The reversal of 221601655043 is 340556106122.

221601655043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221601655043 - 2¹⁰ = 221601654019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221601654994 and 221601655012.

It is not a weakly prime, because it can be changed into another prime (221601655013) 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, 110800827521 + 110800827522.

It is an arithmetic number, because the mean of its divisors is an integer number (110800827522).

Almost surely, 2^221601655043 is an apocalyptic number.

221601655043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221601655043 is an equidigital number, since it uses as much as digits as its factorization.

221601655043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 221601655043 in words is "two hundred twenty-one billion, six hundred one million, six hundred fifty-five thousand, forty-three".