12402102221 has 8 divisors (see below), whose sum is σ = 12576705720. Its totient is φ = 12228636672.

The previous prime is 12402102197. The next prime is 12402102241. The reversal of 12402102221 is 12220120421.

It can be written as a sum of positive squares in 4 ways, for example, as 168636196 + 12233466025 = 12986^2 + 110605^2 .

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-12402102221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12402102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402102241) 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, 262526 + ... + 306143.

It is an arithmetic number, because the mean of its divisors is an integer number (1572088215).

Almost surely, 2^12402102221 is an apocalyptic number.

It is an amenable number.

12402102221 is a deficient number, since it is larger than the sum of its proper divisors (174603499).

12402102221 is a wasteful number, since it uses less digits than its factorization.

12402102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568975.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12402102221 its reverse (12220120421), we get a palindrome (24622222642).

The spelling of 12402102221 in words is "twelve billion, four hundred two million, one hundred two thousand, two hundred twenty-one".