221230201057 has 2 divisors, whose sum is σ = 221230201058. Its totient is φ = 221230201056.

The previous prime is 221230201043. The next prime is 221230201163. The reversal of 221230201057 is 750102032122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221129419536 + 100781521 = 470244^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 221230201057 - 2³⁵ = 186870462689 is a prime.

It is not a weakly prime, because it can be changed into another prime (221230201037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110615100528 + 110615100529.

It is an arithmetic number, because the mean of its divisors is an integer number (110615100529).

Almost surely, 2^221230201057 is an apocalyptic number.

It is an amenable number.

221230201057 is a deficient number, since it is larger than the sum of its proper divisors (1).

221230201057 is an equidigital number, since it uses as much as digits as its factorization.

221230201057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 221230201057 its reverse (750102032122), we get a palindrome (971332233179).

The spelling of 221230201057 in words is "two hundred twenty-one billion, two hundred thirty million, two hundred one thousand, fifty-seven".