1213242135735 has 64 divisors (see below), whose sum is σ = 2430000000000. Its totient is φ = 503999956992.

The previous prime is 1213242135733. The next prime is 1213242135739. The reversal of 1213242135735 is 5375312423121.

It is not a de Polignac number, because 1213242135735 - 2¹ = 1213242135733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213242135693 and 1213242135702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213242135733) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11666985 + ... + 11770514.

It is an arithmetic number, because the mean of its divisors is an integer number (37968750000).

Almost surely, 2^{1213242135735} is an apocalyptic number.

1213242135735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213242135735 is an abundant number, since it is smaller than the sum of its proper divisors (1216757864265).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213242135735 is a wasteful number, since it uses less digits than its factorization.

1213242135735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23437560.

The product of its digits is 151200, while the sum is 39.

Adding to 1213242135735 its reverse (5375312423121), we get a palindrome (6588554558856).

The spelling of 1213242135735 in words is "one trillion, two hundred thirteen billion, two hundred forty-two million, one hundred thirty-five thousand, seven hundred thirty-five".