221002220057 has 2 divisors, whose sum is σ = 221002220058. Its totient is φ = 221002220056.

The previous prime is 221002220053. The next prime is 221002220123. The reversal of 221002220057 is 750022200122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121770289936 + 99231930121 = 348956^2 + 315011^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002220057 - 2² = 221002220053 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002220051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501110028 + 110501110029.

It is an arithmetic number, because the mean of its divisors is an integer number (110501110029).

Almost surely, 2^221002220057 is an apocalyptic number.

It is an amenable number.

221002220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002220057 is an equidigital number, since it uses as much as digits as its factorization.

221002220057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

Adding to 221002220057 its reverse (750022200122), we get a palindrome (971024420179).

The spelling of 221002220057 in words is "two hundred twenty-one billion, two million, two hundred twenty thousand, fifty-seven".