12131100221 has 8 divisors (see below), whose sum is σ = 12806386080. Its totient is φ = 11459495088.

The previous prime is 12131100181. The next prime is 12131100277. The reversal of 12131100221 is 12200113121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131100221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12131100196 and 12131100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131100721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913406 + ... + 926591.

It is an arithmetic number, because the mean of its divisors is an integer number (1600798260).

Almost surely, 2^12131100221 is an apocalyptic number.

It is an amenable number.

12131100221 is a deficient number, since it is larger than the sum of its proper divisors (675285859).

12131100221 is a wasteful number, since it uses less digits than its factorization.

12131100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840363.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12131100221 its reverse (12200113121), we get a palindrome (24331213342).

The spelling of 12131100221 in words is "twelve billion, one hundred thirty-one million, one hundred thousand, two hundred twenty-one".