12001001978234 has 16 divisors (see below), whose sum is σ = 18617229043200. Its totient is φ = 5798491121904.

The previous prime is 12001001978233. The next prime is 12001001978291. The reversal of 12001001978234 is 43287910010021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12001001978233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808032029 + ... + 808046880.

It is an arithmetic number, because the mean of its divisors is an integer number (1163576815200).

Almost surely, 2^{12001001978234} is an apocalyptic number.

12001001978234 is a deficient number, since it is larger than the sum of its proper divisors (6616227064966).

12001001978234 is a wasteful number, since it uses less digits than its factorization.

12001001978234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616079037.

The product of its (nonzero) digits is 24192, while the sum is 38.

Adding to 12001001978234 its reverse (43287910010021), we get a palindrome (55288911988255).

The spelling of 12001001978234 in words is "twelve trillion, one billion, one million, nine hundred seventy-eight thousand, two hundred thirty-four".