1121329449878 has 64 divisors (see below), whose sum is σ = 1946781112320. Its totient is φ = 479714400000.

The previous prime is 1121329449871. The next prime is 1121329449893. The reversal of 1121329449878 is 8789449231211.

It is a happy number.

It is a super-2 number, since 2×1121329449878² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121329449871) 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 31 ways as a sum of consecutive naturals, for example, 3551153 + ... + 3854003.

It is an arithmetic number, because the mean of its divisors is an integer number (30418454880).

Almost surely, 2^{1121329449878} is an apocalyptic number.

1121329449878 is a deficient number, since it is larger than the sum of its proper divisors (825451662442).

1121329449878 is a wasteful number, since it uses less digits than its factorization.

1121329449878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303045.

The product of its digits is 6967296, while the sum is 59.

The spelling of 1121329449878 in words is "one trillion, one hundred twenty-one billion, three hundred twenty-nine million, four hundred forty-nine thousand, eight hundred seventy-eight".