12011201001 has 12 divisors (see below), whose sum is σ = 17569127680. Its totient is φ = 7906106520.

The previous prime is 12011200973. The next prime is 12011201003. The reversal of 12011201001 is 10010211021.

It is a happy number.

It is not a de Polignac number, because 12011201001 - 2⁶ = 12011200937 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 (12011201003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8445985 + ... + 8447406.

Almost surely, 2^12011201001 is an apocalyptic number.

It is an amenable number.

12011201001 is a deficient number, since it is larger than the sum of its proper divisors (5557926679).

12011201001 is a wasteful number, since it uses less digits than its factorization.

12011201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16893476 (or 16893473 counting only the distinct ones).

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

Adding to 12011201001 its reverse (10010211021), we get a palindrome (22021412022).

The spelling of 12011201001 in words is "twelve billion, eleven million, two hundred one thousand, one".