1121234321257 has 2 divisors, whose sum is σ = 1121234321258. Its totient is φ = 1121234321256.

The previous prime is 1121234321209. The next prime is 1121234321261. The reversal of 1121234321257 is 7521234321211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1079886758976 + 41347562281 = 1039176^2 + 203341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121234321257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121234321057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560617160628 + 560617160629.

It is an arithmetic number, because the mean of its divisors is an integer number (560617160629).

Almost surely, 2^{1121234321257} is an apocalyptic number.

It is an amenable number.

1121234321257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121234321257 is an equidigital number, since it uses as much as digits as its factorization.

1121234321257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

Adding to 1121234321257 its reverse (7521234321211), we get a palindrome (8642468642468).

The spelling of 1121234321257 in words is "one trillion, one hundred twenty-one billion, two hundred thirty-four million, three hundred twenty-one thousand, two hundred fifty-seven".