1222243555779 has 24 divisors (see below), whose sum is σ = 1782565664880. Its totient is φ = 806943062592.

The previous prime is 1222243555763. The next prime is 1222243555853. The reversal of 1222243555779 is 9775553422221.

1222243555779 is a `hidden beast` number, since 1 + 2 + 2 + 22 + 43 + 5 + 5 + 577 + 9 = 666.

It is not a de Polignac number, because 1222243555779 - 2⁴ = 1222243555763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222243555279) 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 23 ways as a sum of consecutive naturals, for example, 1619772 + ... + 2251254.

It is an arithmetic number, because the mean of its divisors is an integer number (74273569370).

Almost surely, 2^{1222243555779} is an apocalyptic number.

1222243555779 is a deficient number, since it is larger than the sum of its proper divisors (560322109101).

1222243555779 is a wasteful number, since it uses less digits than its factorization.

1222243555779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633571 (or 633568 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 54.

The spelling of 1222243555779 in words is "one trillion, two hundred twenty-two billion, two hundred forty-three million, five hundred fifty-five thousand, seven hundred seventy-nine".