1321119993 has 4 divisors (see below), whose sum is σ = 1761493328. Its totient is φ = 880746660.

The previous prime is 1321119991. The next prime is 1321120001. The reversal of 1321119993 is 3999111231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1321119993 - 2¹ = 1321119991 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321119991) 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, 220186663 + ... + 220186668.

It is an arithmetic number, because the mean of its divisors is an integer number (440373332).

Almost surely, 2^1321119993 is an apocalyptic number.

It is an amenable number.

1321119993 is a deficient number, since it is larger than the sum of its proper divisors (440373335).

1321119993 is an equidigital number, since it uses as much as digits as its factorization.

1321119993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440373334.

The product of its digits is 13122, while the sum is 39.

The square root of 1321119993 is about 36347.2143774458. The cubic root of 1321119993 is about 1097.2714725257.

The spelling of 1321119993 in words is "one billion, three hundred twenty-one million, one hundred nineteen thousand, nine hundred ninety-three".