12221001002 has 16 divisors (see below), whose sum is σ = 21185686080. Its totient is φ = 5178722208.

The previous prime is 12221000999. The next prime is 12221001007. The reversal of 12221001002 is 20010012221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12221001007) 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, 4902848 + ... + 4905339.

It is an arithmetic number, because the mean of its divisors is an integer number (1324105380).

Almost surely, 2^12221001002 is an apocalyptic number.

12221001002 is a deficient number, since it is larger than the sum of its proper divisors (8964685078).

12221001002 is an equidigital number, since it uses as much as digits as its factorization.

12221001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808285.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12221001002 its reverse (20010012221), we get a palindrome (32231013223).

The spelling of 12221001002 in words is "twelve billion, two hundred twenty-one million, one thousand, two".