12221223001 has 12 divisors (see below), whose sum is σ = 13258192620. Its totient is φ = 11260192320.

The previous prime is 12221222999. The next prime is 12221223011. The reversal of 12221223001 is 10032212221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6551283600 + 5669939401 = 80940^2 + 75299^2 .

It is not a de Polignac number, because 12221223001 - 2¹ = 12221222999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221223011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24595 + ... + 158263.

It is an arithmetic number, because the mean of its divisors is an integer number (1104849385).

Almost surely, 2^12221223001 is an apocalyptic number.

It is an amenable number.

12221223001 is a deficient number, since it is larger than the sum of its proper divisors (1036969619).

12221223001 is a wasteful number, since it uses less digits than its factorization.

12221223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134236 (or 134223 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12221223001 its reverse (10032212221), we get a palindrome (22253435222).

The spelling of 12221223001 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-three thousand, one".