1213110785535 has 32 divisors (see below), whose sum is σ = 2185733928960. Its totient is φ = 569201539200.

The previous prime is 1213110785527. The next prime is 1213110785569. The reversal of 1213110785535 is 5355870113121.

It is not a de Polignac number, because 1213110785535 - 2³ = 1213110785527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118578540 + ... + 118588769.

It is an arithmetic number, because the mean of its divisors is an integer number (68304185280).

Almost surely, 2^{1213110785535} is an apocalyptic number.

1213110785535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213110785535 is a deficient number, since it is larger than the sum of its proper divisors (972623143425).

1213110785535 is a wasteful number, since it uses less digits than its factorization.

1213110785535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237167359.

The product of its (nonzero) digits is 126000, while the sum is 42.

Adding to 1213110785535 its reverse (5355870113121), we get a palindrome (6568980898656).

The spelling of 1213110785535 in words is "one trillion, two hundred thirteen billion, one hundred ten million, seven hundred eighty-five thousand, five hundred thirty-five".