1222120012121 has 4 divisors (see below), whose sum is σ = 1222129788132. Its totient is φ = 1222110236112.

The previous prime is 1222120012073. The next prime is 1222120012181. The reversal of 1222120012121 is 1212100212221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 636070051600 + 586049960521 = 797540^2 + 765539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222120012121 - 2¹⁰ = 1222120011097 is a prime.

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 1222120012121.

It is not an unprimeable number, because it can be changed into a prime (1222120012181) 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 3 ways as a sum of consecutive naturals, for example, 4698026 + ... + 4951331.

It is an arithmetic number, because the mean of its divisors is an integer number (305532447033).

Almost surely, 2^{1222120012121} is an apocalyptic number.

It is an amenable number.

1222120012121 is a deficient number, since it is larger than the sum of its proper divisors (9776011).

1222120012121 is an equidigital number, since it uses as much as digits as its factorization.

1222120012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9776010.

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

Adding to 1222120012121 its reverse (1212100212221), we get a palindrome (2434220224342).

The spelling of 1222120012121 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, twelve thousand, one hundred twenty-one".