111102012109978 has 8 divisors (see below), whose sum is σ = 166782306778740. Its totient is φ = 55507909850400.

The previous prime is 111102012109967. The next prime is 111102012109993. The reversal of 111102012109978 is 879901210201111.

It can be written as a sum of positive squares in 2 ways, for example, as 107663928511129 + 3438083598849 = 10376123^2 + 1854207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×111102012109978⁴ (a number of 57 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21548099073 + ... + 21548104228.

Almost surely, 2^{111102012109978} is an apocalyptic number.

111102012109978 is a deficient number, since it is larger than the sum of its proper divisors (55680294668762).

111102012109978 is a wasteful number, since it uses less digits than its factorization.

111102012109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43096204592.

The product of its (nonzero) digits is 18144, while the sum is 43.

The spelling of 111102012109978 in words is "one hundred eleven trillion, one hundred two billion, twelve million, one hundred nine thousand, nine hundred seventy-eight".