1191222449123 has 6 divisors (see below), whose sum is σ = 1385707746996. Its totient is φ = 1021047813492.

The previous prime is 1191222449119. The next prime is 1191222449129. The reversal of 1191222449123 is 3219442221911.

It is not a de Polignac number, because 1191222449123 - 2² = 1191222449119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191222449129) 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 5 ways as a sum of consecutive naturals, for example, 12155331065 + ... + 12155331162.

It is an arithmetic number, because the mean of its divisors is an integer number (230951291166).

Almost surely, 2^{1191222449123} is an apocalyptic number.

1191222449123 is a deficient number, since it is larger than the sum of its proper divisors (194485297873).

1191222449123 is an equidigital number, since it uses as much as digits as its factorization.

1191222449123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24310662241 (or 24310662234 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The spelling of 1191222449123 in words is "one trillion, one hundred ninety-one billion, two hundred twenty-two million, four hundred forty-nine thousand, one hundred twenty-three".