1200022111109 has 4 divisors (see below), whose sum is σ = 1207665564204. Its totient is φ = 1192378658016.

The previous prime is 1200022111091. The next prime is 1200022111117. The reversal of 1200022111109 is 9011112200021.

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 546560054209 + 653462056900 = 739297^2 + 808370^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200022111109 - 2²⁰ = 1200021062533 is a prime.

It is a super-2 number, since 2×1200022111109² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200022111129) 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, 3821726312 + ... + 3821726625.

It is an arithmetic number, because the mean of its divisors is an integer number (301916391051).

Almost surely, 2^{1200022111109} is an apocalyptic number.

It is an amenable number.

1200022111109 is a deficient number, since it is larger than the sum of its proper divisors (7643453095).

1200022111109 is an equidigital number, since it uses as much as digits as its factorization.

1200022111109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643453094.

The product of its (nonzero) digits is 72, while the sum is 20.

It can be divided in two parts, 1200022 and 111109, that added together give a palindrome (1311131).

The spelling of 1200022111109 in words is "one trillion, two hundred billion, twenty-two million, one hundred eleven thousand, one hundred nine".