12012100100001 has 12 divisors (see below), whose sum is σ = 17350896283812. Its totient is φ = 8008027489536.

The previous prime is 12012100099957. The next prime is 12012100100051. The reversal of 12012100100001 is 10000100121021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2170082534400 + 9842017565601 = 1473120^2 + 3137199^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12012100100001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12012100100051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1267176 + ... + 5062601.

It is an arithmetic number, because the mean of its divisors is an integer number (1445908023651).

Almost surely, 2^{12012100100001} is an apocalyptic number.

It is an amenable number.

12012100100001 is a deficient number, since it is larger than the sum of its proper divisors (5338796183811).

12012100100001 is a wasteful number, since it uses less digits than its factorization.

12012100100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540640 (or 6540637 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12012100100001 its reverse (10000100121021), we get a palindrome (22012200221022).

It can be divided in two parts, 120 and 12100100001, that added together give a palindrome (12100100121).

The spelling of 12012100100001 in words is "twelve trillion, twelve billion, one hundred million, one hundred thousand, one".