12011010020001 has 40 divisors (see below), whose sum is σ = 18345895476480. Its totient is φ = 7829223749568.

The previous prime is 12011010019991. The next prime is 12011010020029. The reversal of 12011010020001 is 10002001011021.

It is a happy number.

It is not a de Polignac number, because 12011010020001 - 2¹³ = 12011010011809 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12011010020041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8452620 + ... + 9770813.

It is an arithmetic number, because the mean of its divisors is an integer number (458647386912).

Almost surely, 2^{12011010020001} is an apocalyptic number.

It is an amenable number.

12011010020001 is a deficient number, since it is larger than the sum of its proper divisors (6334885456479).

12011010020001 is a wasteful number, since it uses less digits than its factorization.

12011010020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18223627 (or 18223618 counting only the distinct ones).

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

Adding to 12011010020001 its reverse (10002001011021), we get a palindrome (22013011031022).

The spelling of 12011010020001 in words is "twelve trillion, eleven billion, ten million, twenty thousand, one".