1155434353121 has 2 divisors, whose sum is σ = 1155434353122. Its totient is φ = 1155434353120.

The previous prime is 1155434353109. The next prime is 1155434353133. The reversal of 1155434353121 is 1213534345511.

It is a balanced prime because it is at equal distance from previous prime (1155434353109) and next prime (1155434353133).

It can be written as a sum of positive squares in only one way, i.e., 820720036096 + 334714317025 = 905936^2 + 578545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155434353121 - 2¹⁰ = 1155434352097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1155434353141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577717176560 + 577717176561.

It is an arithmetic number, because the mean of its divisors is an integer number (577717176561).

Almost surely, 2^{1155434353121} is an apocalyptic number.

It is an amenable number.

1155434353121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155434353121 is an equidigital number, since it uses as much as digits as its factorization.

1155434353121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 38.

Adding to 1155434353121 its reverse (1213534345511), we get a palindrome (2368968698632).

The spelling of 1155434353121 in words is "one trillion, one hundred fifty-five billion, four hundred thirty-four million, three hundred fifty-three thousand, one hundred twenty-one".