1121320223213 has 4 divisors (see below), whose sum is σ = 1125683337180. Its totient is φ = 1116957109248.

The previous prime is 1121320223203. The next prime is 1121320223237. The reversal of 1121320223213 is 3123220231211.

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 1107720465289 + 13599757924 = 1052483^2 + 116618^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121320223213 - 2³⁴ = 1104140354029 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 (1121320223203) 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, 2181556598 + ... + 2181557111.

It is an arithmetic number, because the mean of its divisors is an integer number (281420834295).

Almost surely, 2^{1121320223213} is an apocalyptic number.

It is an amenable number.

1121320223213 is a deficient number, since it is larger than the sum of its proper divisors (4363113967).

1121320223213 is an equidigital number, since it uses as much as digits as its factorization.

1121320223213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363113966.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1121320223213 its reverse (3123220231211), we get a palindrome (4244540454424).

The spelling of 1121320223213 in words is "one trillion, one hundred twenty-one billion, three hundred twenty million, two hundred twenty-three thousand, two hundred thirteen".