221102020057 has 2 divisors, whose sum is σ = 221102020058. Its totient is φ = 221102020056.

The previous prime is 221102020039. The next prime is 221102020103. The reversal of 221102020057 is 750020201122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219177530896 + 1924489161 = 468164^2 + 43869^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102020057 - 2¹⁵ = 221101987289 is a prime.

It is a super-2 number, since 2×221102020057² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221102020157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551010028 + 110551010029.

It is an arithmetic number, because the mean of its divisors is an integer number (110551010029).

Almost surely, 2^221102020057 is an apocalyptic number.

It is an amenable number.

221102020057 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102020057 is an equidigital number, since it uses as much as digits as its factorization.

221102020057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

Adding to 221102020057 its reverse (750020201122), we get a palindrome (971122221179).

The spelling of 221102020057 in words is "two hundred twenty-one billion, one hundred two million, twenty thousand, fifty-seven".