1222012111121 has 4 divisors (see below), whose sum is σ = 1223522633700. Its totient is φ = 1220501588544.

The previous prime is 1222012111091. The next prime is 1222012111129. The reversal of 1222012111121 is 1211112102221.

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 703986443521 + 518025667600 = 839039^2 + 719740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222012111121 - 2¹⁸ = 1222011848977 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 1222012111121.

It is not an unprimeable number, because it can be changed into a prime (1222012111129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755260076 + ... + 755261693.

It is an arithmetic number, because the mean of its divisors is an integer number (305880658425).

Almost surely, 2^{1222012111121} is an apocalyptic number.

It is an amenable number.

1222012111121 is a deficient number, since it is larger than the sum of its proper divisors (1510522579).

1222012111121 is an equidigital number, since it uses as much as digits as its factorization.

1222012111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510522578.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1222012111121 its reverse (1211112102221), we get a palindrome (2433124213342).

It can be divided in two parts, 122201 and 2111121, that added together give a palindrome (2233322).

The spelling of 1222012111121 in words is "one trillion, two hundred twenty-two billion, twelve million, one hundred eleven thousand, one hundred twenty-one".