221541216230057 has 2 divisors, whose sum is σ = 221541216230058. Its totient is φ = 221541216230056.

The previous prime is 221541216230027. The next prime is 221541216230063. The reversal of 221541216230057 is 750032612145122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193542185859136 + 27999030370921 = 13911944^2 + 5291411^2 .

It is a cyclic number.

It is not a de Polignac number, because 221541216230057 - 2¹² = 221541216225961 is a prime.

It is a super-2 number, since 2×221541216230057² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221541216229996 and 221541216230023.

It is not a weakly prime, because it can be changed into another prime (221541216230027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110770608115028 + 110770608115029.

It is an arithmetic number, because the mean of its divisors is an integer number (110770608115029).

Almost surely, 2^{221541216230057} is an apocalyptic number.

It is an amenable number.

221541216230057 is a deficient number, since it is larger than the sum of its proper divisors (1).

221541216230057 is an equidigital number, since it uses as much as digits as its factorization.

221541216230057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

Adding to 221541216230057 its reverse (750032612145122), we get a palindrome (971573828375179).

The spelling of 221541216230057 in words is "two hundred twenty-one trillion, five hundred forty-one billion, two hundred sixteen million, two hundred thirty thousand, fifty-seven".