1213534345501 has 2 divisors, whose sum is σ = 1213534345502. Its totient is φ = 1213534345500.

The previous prime is 1213534345487. The next prime is 1213534345519. The reversal of 1213534345501 is 1055434353121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967270283001 + 246264062500 = 983499^2 + 496250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213534345501 - 2²¹ = 1213532248349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213534345531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606767172750 + 606767172751.

It is an arithmetic number, because the mean of its divisors is an integer number (606767172751).

Almost surely, 2^{1213534345501} is an apocalyptic number.

It is an amenable number.

1213534345501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213534345501 is an equidigital number, since it uses as much as digits as its factorization.

1213534345501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 1213534345501 its reverse (1055434353121), we get a palindrome (2268968698622).

The spelling of 1213534345501 in words is "one trillion, two hundred thirteen billion, five hundred thirty-four million, three hundred forty-five thousand, five hundred one".