1122112111121 has 4 divisors (see below), whose sum is σ = 1122114572772. Its totient is φ = 1122109649472.

The previous prime is 1122112111079. The next prime is 1122112111163. The reversal of 1122112111121 is 1211112112211.

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

It is an interprime number because it is at equal distance from previous prime (1122112111079) and next prime (1122112111163).

It can be written as a sum of positive squares in 2 ways, for example, as 613402240000 + 508709871121 = 783200^2 + 713239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122112111121 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 1122112111121.

It is not an unprimeable number, because it can be changed into a prime (1122112111181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324716 + ... + 1532861.

It is an arithmetic number, because the mean of its divisors is an integer number (280528643193).

Almost surely, 2^{1122112111121} is an apocalyptic number.

It is an amenable number.

1122112111121 is a deficient number, since it is larger than the sum of its proper divisors (2461651).

1122112111121 is an equidigital number, since it uses as much as digits as its factorization.

1122112111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461650.

The product of its digits is 16, while the sum is 17.

Adding to 1122112111121 its reverse (1211112112211), we get a palindrome (2333224223332).

The spelling of 1122112111121 in words is "one trillion, one hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, one hundred twenty-one".