1121121219917 has 2 divisors, whose sum is σ = 1121121219918. Its totient is φ = 1121121219916.

The previous prime is 1121121219899. The next prime is 1121121220031. The reversal of 1121121219917 is 7199121211211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 706463784196 + 414657435721 = 840514^2 + 643939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121121219917 - 2⁶ = 1121121219853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121121279917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560560609958 + 560560609959.

It is an arithmetic number, because the mean of its divisors is an integer number (560560609959).

Almost surely, 2^{1121121219917} is an apocalyptic number.

It is an amenable number.

1121121219917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121121219917 is an equidigital number, since it uses as much as digits as its factorization.

1121121219917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 38.

The spelling of 1121121219917 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred seventeen".