12001011201 has 12 divisors (see below), whose sum is σ = 17382032512. Its totient is φ = 7978871736.

The previous prime is 12001011163. The next prime is 12001011203. The reversal of 12001011201 is 10211010021.

It is a happy number.

It is not a de Polignac number, because 12001011201 - 2⁹ = 12001010689 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001011203) 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, 1813381 + ... + 1819986.

Almost surely, 2^12001011201 is an apocalyptic number.

It is an amenable number.

12001011201 is a deficient number, since it is larger than the sum of its proper divisors (5381021311).

12001011201 is a wasteful number, since it uses less digits than its factorization.

12001011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633740 (or 3633737 counting only the distinct ones).

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

Adding to 12001011201 its reverse (10211010021), we get a palindrome (22212021222).

The spelling of 12001011201 in words is "twelve billion, one million, eleven thousand, two hundred one".