12200221101221 has 2 divisors, whose sum is σ = 12200221101222. Its totient is φ = 12200221101220.

The previous prime is 12200221101217. The next prime is 12200221101259. The reversal of 12200221101221 is 12210112200221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10670512230625 + 1529708870596 = 3266575^2 + 1236814^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200221101221 - 2² = 12200221101217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12200221101221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12200221101521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100110550610 + 6100110550611.

It is an arithmetic number, because the mean of its divisors is an integer number (6100110550611).

Almost surely, 2^{12200221101221} is an apocalyptic number.

It is an amenable number.

12200221101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200221101221 is an equidigital number, since it uses as much as digits as its factorization.

12200221101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12200221101221 its reverse (12210112200221), we get a palindrome (24410333301442).

The spelling of 12200221101221 in words is "twelve trillion, two hundred billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty-one".