1122001111001 has 4 divisors (see below), whose sum is σ = 1188001176372. Its totient is φ = 1056001045632.

The previous prime is 1122001110953. The next prime is 1122001111003. The reversal of 1122001111001 is 1001111002211.

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 663123576976 + 458877534025 = 814324^2 + 677405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122001111001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122001111003) 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, 33000032660 + ... + 33000032693.

It is an arithmetic number, because the mean of its divisors is an integer number (297000294093).

Almost surely, 2^{1122001111001} is an apocalyptic number.

It is an amenable number.

1122001111001 is a deficient number, since it is larger than the sum of its proper divisors (66000065371).

1122001111001 is an equidigital number, since it uses as much as digits as its factorization.

1122001111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66000065370.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1122001111001 its reverse (1001111002211), we get a palindrome (2123112113212).

The spelling of 1122001111001 in words is "one trillion, one hundred twenty-two billion, one million, one hundred eleven thousand, one".