1222000002221 has 8 divisors (see below), whose sum is σ = 1222672521720. Its totient is φ = 1221327631872.

The previous prime is 1222000002211. The next prime is 1222000002233.

1222000002221 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 597125562121 + 624874440100 = 772739^2 + 790490^2 .

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 1222000002221 - 2³⁴ = 1204820133037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222000002196 and 1222000002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222000002211) 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, 18933221 + ... + 18997653.

It is an arithmetic number, because the mean of its divisors is an integer number (152834065215).

Almost surely, 2^{1222000002221} is an apocalyptic number.

It is an amenable number.

1222000002221 is a deficient number, since it is larger than the sum of its proper divisors (672519499).

1222000002221 is an equidigital number, since it uses as much as digits as its factorization.

1222000002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74575.

The product of its (nonzero) digits is 64, while the sum is 14.

It can be divided in two parts, 122200000 and 2221, that added together give a palindrome (122202221).

The spelling of 1222000002221 in words is "one trillion, two hundred twenty-two billion, two thousand, two hundred twenty-one".