1222211123213 has 8 divisors (see below), whose sum is σ = 1223298984600. Its totient is φ = 1221123416128.

The previous prime is 1222211123191. The next prime is 1222211123239. The reversal of 1222211123213 is 3123211122221.

It can be written as a sum of positive squares in 4 ways, for example, as 512637384169 + 709573739044 = 715987^2 + 842362^2 .

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 1222211123213 - 2²⁴ = 1222194345997 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 (1222211123513) 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, 20653295 + ... + 20712387.

It is an arithmetic number, because the mean of its divisors is an integer number (152912373075).

Almost surely, 2^{1222211123213} is an apocalyptic number.

It is an amenable number.

1222211123213 is a deficient number, since it is larger than the sum of its proper divisors (1087861387).

1222211123213 is a wasteful number, since it uses less digits than its factorization.

1222211123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77151.

The product of its digits is 576, while the sum is 23.

Adding to 1222211123213 its reverse (3123211122221), we get a palindrome (4345422245434).

The spelling of 1222211123213 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty-three thousand, two hundred thirteen".