2221322211257 has 2 divisors, whose sum is σ = 2221322211258. Its totient is φ = 2221322211256.

The previous prime is 2221322211253. The next prime is 2221322211307. The reversal of 2221322211257 is 7521122231222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2121054355456 + 100267855801 = 1456384^2 + 316651^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221322211257 - 2² = 2221322211253 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221322211253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110661105628 + 1110661105629.

It is an arithmetic number, because the mean of its divisors is an integer number (1110661105629).

Almost surely, 2^{2221322211257} is an apocalyptic number.

It is an amenable number.

2221322211257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221322211257 is an equidigital number, since it uses as much as digits as its factorization.

2221322211257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

Adding to 2221322211257 its reverse (7521122231222), we get a palindrome (9742444442479).

The spelling of 2221322211257 in words is "two trillion, two hundred twenty-one billion, three hundred twenty-two million, two hundred eleven thousand, two hundred fifty-seven".