135312120012 has 12 divisors (see below), whose sum is σ = 315728280056. Its totient is φ = 45104040000.

The previous prime is 135312119993. The next prime is 135312120067. The reversal of 135312120012 is 210021213531.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5638004989 + ... + 5638005012.

Almost surely, 2^135312120012 is an apocalyptic number.

135312120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135312120012 is an abundant number, since it is smaller than the sum of its proper divisors (180416160044).

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

135312120012 is a wasteful number, since it uses less digits than its factorization.

135312120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11276010008 (or 11276010006 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 135312120012 its reverse (210021213531), we get a palindrome (345333333543).

The spelling of 135312120012 in words is "one hundred thirty-five billion, three hundred twelve million, one hundred twenty thousand, twelve".