12001121212134 has 32 divisors (see below), whose sum is σ = 24055355925216. Its totient is φ = 3991522245120.

The previous prime is 12001121212123. The next prime is 12001121212163. The reversal of 12001121212134 is 43121212110021.

12001121212134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12001121212134.

It is a congruent number.

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, 73873404 + ... + 74035680.

It is an arithmetic number, because the mean of its divisors is an integer number (751729872663).

Almost surely, 2^{12001121212134} is an apocalyptic number.

12001121212134 is an abundant number, since it is smaller than the sum of its proper divisors (12054234713082).

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

12001121212134 is a wasteful number, since it uses less digits than its factorization.

12001121212134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189480.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12001121212134 its reverse (43121212110021), we get a palindrome (55122333322155).

The spelling of 12001121212134 in words is "twelve trillion, one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirty-four".