220000121057 has 2 divisors, whose sum is σ = 220000121058. Its totient is φ = 220000121056.

The previous prime is 220000121039. The next prime is 220000121063. The reversal of 220000121057 is 750121000022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216114344161 + 3885776896 = 464881^2 + 62336^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000121057 - 2⁸ = 220000120801 is a prime.

It is not a weakly prime, because it can be changed into another prime (220000121017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000060528 + 110000060529.

It is an arithmetic number, because the mean of its divisors is an integer number (110000060529).

Almost surely, 2^220000121057 is an apocalyptic number.

It is an amenable number.

220000121057 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000121057 is an equidigital number, since it uses as much as digits as its factorization.

220000121057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

Adding to 220000121057 its reverse (750121000022), we get a palindrome (970121121079).

The spelling of 220000121057 in words is "two hundred twenty billion, one hundred twenty-one thousand, fifty-seven".