12200001221 has 8 divisors (see below), whose sum is σ = 12372403104. Its totient is φ = 12028680720.

The previous prime is 12200001217. The next prime is 12200001241. The reversal of 12200001221 is 12210000221.

It is a happy number.

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 12200001221 - 2² = 12200001217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200001241) 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, 247610 + ... + 292763.

It is an arithmetic number, because the mean of its divisors is an integer number (1546550388).

Almost surely, 2^12200001221 is an apocalyptic number.

It is an amenable number.

12200001221 is a deficient number, since it is larger than the sum of its proper divisors (172401883).

12200001221 is a wasteful number, since it uses less digits than its factorization.

12200001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540691.

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

Adding to 12200001221 its reverse (12210000221), we get a palindrome (24410001442).

It can be divided in two parts, 1220000 and 1221, that added together give a palindrome (1221221).

The spelling of 12200001221 in words is "twelve billion, two hundred million, one thousand, two hundred twenty-one".