1121320021331 has 2 divisors, whose sum is σ = 1121320021332. Its totient is φ = 1121320021330.

The previous prime is 1121320021303. The next prime is 1121320021343. The reversal of 1121320021331 is 1331200231211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121320021331 is a prime.

It is a super-3 number, since 3×1121320021331³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1121323021331) 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 as a sum of consecutive naturals, namely, 560660010665 + 560660010666.

It is an arithmetic number, because the mean of its divisors is an integer number (560660010666).

Almost surely, 2^{1121320021331} is an apocalyptic number.

1121320021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121320021331 is an equidigital number, since it uses as much as digits as its factorization.

1121320021331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1121320021331 its reverse (1331200231211), we get a palindrome (2452520252542).

The spelling of 1121320021331 in words is "one trillion, one hundred twenty-one billion, three hundred twenty million, twenty-one thousand, three hundred thirty-one".