12111231001 has 32 divisors (see below), whose sum is σ = 13425205248. Its totient is φ = 10875582720.

The previous prime is 12111230987. The next prime is 12111231017. The reversal of 12111231001 is 10013211121.

12111231001 = 5734² + 5735² + ... + 6080².

It is a happy number.

It is not a de Polignac number, because 12111231001 - 2²⁷ = 11977013273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111231061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18835186 + ... + 18835828.

It is an arithmetic number, because the mean of its divisors is an integer number (419537664).

Almost surely, 2^12111231001 is an apocalyptic number.

It is an amenable number.

12111231001 is a deficient number, since it is larger than the sum of its proper divisors (1313974247).

12111231001 is a wasteful number, since it uses less digits than its factorization.

12111231001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12111231001 its reverse (10013211121), we get a palindrome (22124442122).

The spelling of 12111231001 in words is "twelve billion, one hundred eleven million, two hundred thirty-one thousand, one".