1055111321497 has 2 divisors, whose sum is σ = 1055111321498. Its totient is φ = 1055111321496.

The previous prime is 1055111321471. The next prime is 1055111321519. The reversal of 1055111321497 is 7941231115501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755758990336 + 299352331161 = 869344^2 + 547131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055111321497 is a prime.

It is a super-2 number, since 2×1055111321497² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1055111322497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527555660748 + 527555660749.

It is an arithmetic number, because the mean of its divisors is an integer number (527555660749).

Almost surely, 2^{1055111321497} is an apocalyptic number.

It is an amenable number.

1055111321497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055111321497 is an equidigital number, since it uses as much as digits as its factorization.

1055111321497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 40.

Adding to 1055111321497 its reverse (7941231115501), we get a palindrome (8996342436998).

The spelling of 1055111321497 in words is "one trillion, fifty-five billion, one hundred eleven million, three hundred twenty-one thousand, four hundred ninety-seven".