12251250221 has 8 divisors (see below), whose sum is σ = 14342927424. Its totient is φ = 10244947680.

The previous prime is 12251250197. The next prime is 12251250241. The reversal of 12251250221 is 12205215221.

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-12251250221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251250241) 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, 21343355 + ... + 21343928.

It is an arithmetic number, because the mean of its divisors is an integer number (1792865928).

Almost surely, 2^12251250221 is an apocalyptic number.

It is an amenable number.

12251250221 is a deficient number, since it is larger than the sum of its proper divisors (2091677203).

12251250221 is an equidigital number, since it uses as much as digits as its factorization.

12251250221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42687331.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12251250221 its reverse (12205215221), we get a palindrome (24456465442).

The spelling of 12251250221 in words is "twelve billion, two hundred fifty-one million, two hundred fifty thousand, two hundred twenty-one".