220012221257 has 2 divisors, whose sum is σ = 220012221258. Its totient is φ = 220012221256.

The previous prime is 220012221157. The next prime is 220012221281. The reversal of 220012221257 is 752122210022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119262478336 + 100749742921 = 345344^2 + 317411^2 .

It is a cyclic number.

It is not a de Polignac number, because 220012221257 - 2¹⁸ = 220011959113 is a prime.

It is not a weakly prime, because it can be changed into another prime (220012221157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110006110628 + 110006110629.

It is an arithmetic number, because the mean of its divisors is an integer number (110006110629).

Almost surely, 2^220012221257 is an apocalyptic number.

It is an amenable number.

220012221257 is a deficient number, since it is larger than the sum of its proper divisors (1).

220012221257 is an equidigital number, since it uses as much as digits as its factorization.

220012221257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

Adding to 220012221257 its reverse (752122210022), we get a palindrome (972134431279).

The spelling of 220012221257 in words is "two hundred twenty billion, twelve million, two hundred twenty-one thousand, two hundred fifty-seven".