220321121057 has 2 divisors, whose sum is σ = 220321121058. Its totient is φ = 220321121056.

The previous prime is 220321121029. The next prime is 220321121147. The reversal of 220321121057 is 750121123022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144704920801 + 75616200256 = 380401^2 + 274984^2 .

It is a cyclic number.

It is not a de Polignac number, because 220321121057 - 2⁶ = 220321120993 is a prime.

It is not a weakly prime, because it can be changed into another prime (220321121017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110160560528 + 110160560529.

It is an arithmetic number, because the mean of its divisors is an integer number (110160560529).

Almost surely, 2^220321121057 is an apocalyptic number.

It is an amenable number.

220321121057 is a deficient number, since it is larger than the sum of its proper divisors (1).

220321121057 is an equidigital number, since it uses as much as digits as its factorization.

220321121057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 220321121057 its reverse (750121123022), we get a palindrome (970442244079).

The spelling of 220321121057 in words is "two hundred twenty billion, three hundred twenty-one million, one hundred twenty-one thousand, fifty-seven".