221077450481 has 2 divisors, whose sum is σ = 221077450482. Its totient is φ = 221077450480.

The previous prime is 221077450463. The next prime is 221077450501. The reversal of 221077450481 is 184054770122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193702093456 + 27375357025 = 440116^2 + 165455^2 .

It is a cyclic number.

It is not a de Polignac number, because 221077450481 - 2³⁴ = 203897581297 is a prime.

It is a super-2 number, since 2×221077450481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221077455481) 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, 110538725240 + 110538725241.

It is an arithmetic number, because the mean of its divisors is an integer number (110538725241).

Almost surely, 2^221077450481 is an apocalyptic number.

It is an amenable number.

221077450481 is a deficient number, since it is larger than the sum of its proper divisors (1).

221077450481 is an equidigital number, since it uses as much as digits as its factorization.

221077450481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 221077450481 in words is "two hundred twenty-one billion, seventy-seven million, four hundred fifty thousand, four hundred eighty-one".