1345312232161 has 2 divisors, whose sum is σ = 1345312232162. Its totient is φ = 1345312232160.

The previous prime is 1345312232141. The next prime is 1345312232171. The reversal of 1345312232161 is 1612322135431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1343501219025 + 1811013136 = 1159095^2 + 42556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345312232161 - 2²¹ = 1345310135009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345312232141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672656116080 + 672656116081.

It is an arithmetic number, because the mean of its divisors is an integer number (672656116081).

Almost surely, 2^{1345312232161} is an apocalyptic number.

It is an amenable number.

1345312232161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345312232161 is an equidigital number, since it uses as much as digits as its factorization.

1345312232161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

Adding to 1345312232161 its reverse (1612322135431), we get a palindrome (2957634367592).

The spelling of 1345312232161 in words is "one trillion, three hundred forty-five billion, three hundred twelve million, two hundred thirty-two thousand, one hundred sixty-one".