1213530323055 has 16 divisors (see below), whose sum is σ = 1942156760544. Its totient is φ = 647046757760.

The previous prime is 1213530323053. The next prime is 1213530323069. The reversal of 1213530323055 is 5503230353121.

It is not a de Polignac number, because 1213530323055 - 2¹ = 1213530323053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213530323053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10529184 + ... + 10643813.

It is an arithmetic number, because the mean of its divisors is an integer number (121384797534).

Almost surely, 2^{1213530323055} is an apocalyptic number.

1213530323055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213530323055 is a deficient number, since it is larger than the sum of its proper divisors (728626437489).

1213530323055 is a wasteful number, since it uses less digits than its factorization.

1213530323055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176826.

The product of its (nonzero) digits is 40500, while the sum is 33.

Adding to 1213530323055 its reverse (5503230353121), we get a palindrome (6716760676176).

The spelling of 1213530323055 in words is "one trillion, two hundred thirteen billion, five hundred thirty million, three hundred twenty-three thousand, fifty-five".