1121323220111 has 4 divisors (see below), whose sum is σ = 1121866762272. Its totient is φ = 1120779677952.

The previous prime is 1121323220107. The next prime is 1121323220137. The reversal of 1121323220111 is 1110223231211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121323220111 - 2² = 1121323220107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121323220411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271767986 + ... + 271772111.

It is an arithmetic number, because the mean of its divisors is an integer number (280466690568).

Almost surely, 2^{1121323220111} is an apocalyptic number.

1121323220111 is a deficient number, since it is larger than the sum of its proper divisors (543542161).

1121323220111 is an equidigital number, since it uses as much as digits as its factorization.

1121323220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543542160.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1121323220111 its reverse (1110223231211), we get a palindrome (2231546451322).

The spelling of 1121323220111 in words is "one trillion, one hundred twenty-one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred eleven".