1112201918978 has 4 divisors (see below), whose sum is σ = 1668302878470. Its totient is φ = 556100959488.

The previous prime is 1112201918969. The next prime is 1112201918987. The reversal of 1112201918978 is 8798191022111.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1112201918969) and next prime (1112201918987).

It can be written as a sum of positive squares in only one way, i.e., 1078704500449 + 33497418529 = 1038607^2 + 183023^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 278050479743 + ... + 278050479746.

Almost surely, 2^{1112201918978} is an apocalyptic number.

1112201918978 is a deficient number, since it is larger than the sum of its proper divisors (556100959492).

1112201918978 is an equidigital number, since it uses as much as digits as its factorization.

1112201918978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556100959491.

The product of its (nonzero) digits is 145152, while the sum is 50.

The spelling of 1112201918978 in words is "one trillion, one hundred twelve billion, two hundred one million, nine hundred eighteen thousand, nine hundred seventy-eight".