221200949077 has 2 divisors, whose sum is σ = 221200949078. Its totient is φ = 221200949076.

The previous prime is 221200949063. The next prime is 221200949153. The reversal of 221200949077 is 770949002122.

221200949077 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 can be written as a sum of positive squares in only one way, i.e., 206442100881 + 14758848196 = 454359^2 + 121486^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200949077 - 2¹⁵ = 221200916309 is a prime.

It is a super-3 number, since 3×221200949077³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221200949017) 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, 110600474538 + 110600474539.

It is an arithmetic number, because the mean of its divisors is an integer number (110600474539).

Almost surely, 2^221200949077 is an apocalyptic number.

It is an amenable number.

221200949077 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200949077 is an equidigital number, since it uses as much as digits as its factorization.

221200949077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 221200949077 in words is "two hundred twenty-one billion, two hundred million, nine hundred forty-nine thousand, seventy-seven".