135251212540000 has 120 divisors (see below), whose sum is σ = 343471764702528. Its totient is φ = 52355307840000.

The previous prime is 135251212539983. The next prime is 135251212540001. The reversal of 135251212540000 is 45212152531.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135251212540001) 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 19 ways as a sum of consecutive naturals, for example, 108453559 + ... + 109693558.

Almost surely, 2^{135251212540000} is an apocalyptic number.

135251212540000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135251212540000 is an abundant number, since it is smaller than the sum of its proper divisors (208220552162528).

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

135251212540000 is an equidigital number, since it uses as much as digits as its factorization.

135251212540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218147178 (or 218147155 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 135251212540000 its reverse (45212152531), we get a palindrome (135296424692531).

The spelling of 135251212540000 in words is "one hundred thirty-five trillion, two hundred fifty-one billion, two hundred twelve million, five hundred forty thousand".