1222201011221 has 8 divisors (see below), whose sum is σ = 1225533019200. Its totient is φ = 1218870417600.

The previous prime is 1222201011191. The next prime is 1222201011257. The reversal of 1222201011221 is 1221101022221.

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 1222201011221 - 2²² = 1222196816917 is a prime.

It is a super-3 number, since 3×1222201011221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222201011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222201011721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388720 + ... + 2091158.

It is an arithmetic number, because the mean of its divisors is an integer number (153191627400).

Almost surely, 2^{1222201011221} is an apocalyptic number.

It is an amenable number.

1222201011221 is a deficient number, since it is larger than the sum of its proper divisors (3332007979).

1222201011221 is an equidigital number, since it uses as much as digits as its factorization.

1222201011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707179.

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

Adding to 1222201011221 its reverse (1221101022221), we get a palindrome (2443302033442).

The spelling of 1222201011221 in words is "one trillion, two hundred twenty-two billion, two hundred one million, eleven thousand, two hundred twenty-one".