12131250266221 has 8 divisors (see below), whose sum is σ = 12434154614784. Its totient is φ = 11831087133840.

The previous prime is 12131250266183. The next prime is 12131250266237. The reversal of 12131250266221 is 12266205213121.

It is a happy number.

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-12131250266221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131250267221) 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, 685295085 + ... + 685312786.

It is an arithmetic number, because the mean of its divisors is an integer number (1554269326848).

Almost surely, 2^{12131250266221} is an apocalyptic number.

It is an amenable number.

12131250266221 is a deficient number, since it is larger than the sum of its proper divisors (302904348563).

12131250266221 is a wasteful number, since it uses less digits than its factorization.

12131250266221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370608091.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 12131250266221 its reverse (12266205213121), we get a palindrome (24397455479342).

The spelling of 12131250266221 in words is "twelve trillion, one hundred thirty-one billion, two hundred fifty million, two hundred sixty-six thousand, two hundred twenty-one".