1121642223217 has 4 divisors (see below), whose sum is σ = 1122302402800. Its totient is φ = 1120982043636.

The previous prime is 1121642223203. The next prime is 1121642223257. The reversal of 1121642223217 is 7123222461211.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121642223217 is a prime.

It is a super-3 number, since 3×1121642223217³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121642223257) 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, 330087243 + ... + 330090640.

It is an arithmetic number, because the mean of its divisors is an integer number (280575600700).

Almost surely, 2^{1121642223217} is an apocalyptic number.

It is an amenable number.

1121642223217 is a deficient number, since it is larger than the sum of its proper divisors (660179583).

1121642223217 is an equidigital number, since it uses as much as digits as its factorization.

1121642223217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660179582.

The product of its digits is 16128, while the sum is 34.

Adding to 1121642223217 its reverse (7123222461211), we get a palindrome (8244864684428).

The spelling of 1121642223217 in words is "one trillion, one hundred twenty-one billion, six hundred forty-two million, two hundred twenty-three thousand, two hundred seventeen".