12206220251 has 8 divisors (see below), whose sum is σ = 12415412400. Its totient is φ = 11997105120.

The previous prime is 12206220239. The next prime is 12206220259. The reversal of 12206220251 is 15202260221.

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

It is a cyclic number.

It is not a de Polignac number, because 12206220251 - 2²² = 12202025947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12206220259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365681 + ... + 397661.

It is an arithmetic number, because the mean of its divisors is an integer number (1551926550).

Almost surely, 2^12206220251 is an apocalyptic number.

12206220251 is a deficient number, since it is larger than the sum of its proper divisors (209192149).

12206220251 is an equidigital number, since it uses as much as digits as its factorization.

12206220251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38509.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12206220251 its reverse (15202260221), we get a palindrome (27408480472).

The spelling of 12206220251 in words is "twelve billion, two hundred six million, two hundred twenty thousand, two hundred fifty-one".