12221440004 has 6 divisors (see below), whose sum is σ = 21387520014. Its totient is φ = 6110720000.

The previous prime is 12221440001. The next prime is 12221440079. The reversal of 12221440004 is 40004412221.

It can be written as a sum of positive squares in only one way, i.e., 12100440004 + 121000000 = 110002^2 + 11000^2 .

It is not an unprimeable number, because it can be changed into a prime (12221440001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1527679997 + ... + 1527680004.

It is an arithmetic number, because the mean of its divisors is an integer number (3564586669).

Almost surely, 2^12221440004 is an apocalyptic number.

It is an amenable number.

12221440004 is a deficient number, since it is larger than the sum of its proper divisors (9166080010).

12221440004 is a wasteful number, since it uses less digits than its factorization.

12221440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055360005 (or 3055360003 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12221440004 its reverse (40004412221), we get a palindrome (52225852225).

The spelling of 12221440004 in words is "twelve billion, two hundred twenty-one million, four hundred forty thousand, four".