12221001210221 has 8 divisors (see below), whose sum is σ = 12615339116544. Its totient is φ = 11826670307760.

The previous prime is 12221001210137. The next prime is 12221001210251. The reversal of 12221001210221 is 12201210012221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221001210221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221001210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221001210251) 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, 1917131 + ... + 5302583.

It is an arithmetic number, because the mean of its divisors is an integer number (1576917389568).

Almost surely, 2^{12221001210221} is an apocalyptic number.

It is an amenable number.

12221001210221 is a deficient number, since it is larger than the sum of its proper divisors (394337906323).

12221001210221 is a wasteful number, since it uses less digits than its factorization.

12221001210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501931.

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

Adding to 12221001210221 its reverse (12201210012221), we get a palindrome (24422211222442).

The spelling of 12221001210221 in words is "twelve trillion, two hundred twenty-one billion, one million, two hundred ten thousand, two hundred twenty-one".