221174354641 has 2 divisors, whose sum is σ = 221174354642. Its totient is φ = 221174354640.

The previous prime is 221174354629. The next prime is 221174354761. The reversal of 221174354641 is 146453471122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193772518416 + 27401836225 = 440196^2 + 165535^2 .

It is a cyclic number.

It is not a de Polignac number, because 221174354641 - 2¹⁵ = 221174321873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221174354594 and 221174354603.

It is not a weakly prime, because it can be changed into another prime (221174354441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110587177320 + 110587177321.

It is an arithmetic number, because the mean of its divisors is an integer number (110587177321).

Almost surely, 2^221174354641 is an apocalyptic number.

It is an amenable number.

221174354641 is a deficient number, since it is larger than the sum of its proper divisors (1).

221174354641 is an equidigital number, since it uses as much as digits as its factorization.

221174354641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The spelling of 221174354641 in words is "two hundred twenty-one billion, one hundred seventy-four million, three hundred fifty-four thousand, six hundred forty-one".