12112005251 has 6 divisors (see below), whose sum is σ = 12160515756. Its totient is φ = 12063687500.

The previous prime is 12112005239. The next prime is 12112005293. The reversal of 12112005251 is 15250021121.

It is a de Polignac number, because none of the positive numbers 2^k-12112005251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112005211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33125 + ... + 159126.

It is an arithmetic number, because the mean of its divisors is an integer number (2026752626).

Almost surely, 2^12112005251 is an apocalyptic number.

12112005251 is a deficient number, since it is larger than the sum of its proper divisors (48510505).

12112005251 is an frugal number, since it uses more digits than its factorization.

12112005251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192753 (or 192502 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 12112005251 its reverse (15250021121), we get a palindrome (27362026372).

The spelling of 12112005251 in words is "twelve billion, one hundred twelve million, five thousand, two hundred fifty-one".