12001002311 has 4 divisors (see below), whose sum is σ = 12280095432. Its totient is φ = 11721909192.

The previous prime is 12001002301. The next prime is 12001002313. The reversal of 12001002311 is 11320010021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001002311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001002292 and 12001002301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001002313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139546496 + ... + 139546581.

It is an arithmetic number, because the mean of its divisors is an integer number (3070023858).

Almost surely, 2^12001002311 is an apocalyptic number.

12001002311 is a deficient number, since it is larger than the sum of its proper divisors (279093121).

12001002311 is an equidigital number, since it uses as much as digits as its factorization.

12001002311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279093120.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 12001002311 its reverse (11320010021), we get a palindrome (23321012332).

The spelling of 12001002311 in words is "twelve billion, one million, two thousand, three hundred eleven".