12135243455020 has 48 divisors (see below), whose sum is σ = 29167604585280. Its totient is φ = 4154509142784.

The previous prime is 12135243454907. The next prime is 12135243455033. The reversal of 12135243455020 is 2055434253121.

It is a happy number.

It is a super-3 number, since 3×12135243455020³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63923175 + ... + 64112734.

It is an arithmetic number, because the mean of its divisors is an integer number (607658428860).

Almost surely, 2^{12135243455020} is an apocalyptic number.

12135243455020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12135243455020 is an abundant number, since it is smaller than the sum of its proper divisors (17032361130260).

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

12135243455020 is a wasteful number, since it uses less digits than its factorization.

12135243455020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128036602 (or 128036600 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 12135243455020 in words is "twelve trillion, one hundred thirty-five billion, two hundred forty-three million, four hundred fifty-five thousand, twenty".