12112011109978 has 8 divisors (see below), whose sum is σ = 19565556408468. Its totient is φ = 5590158973824.

The previous prime is 12112011109943. The next prime is 12112011109987. The reversal of 12112011109978 is 87990111021121.

It can be written as a sum of positive squares in 2 ways, for example, as 12084918937569 + 27092172409 = 3476337^2 + 164597^2 .

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

It is a super-2 number, since 2×12112011109978² (a number of 27 digits) contains 22 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, 232923290551 + ... + 232923290602.

Almost surely, 2^{12112011109978} is an apocalyptic number.

12112011109978 is a deficient number, since it is larger than the sum of its proper divisors (7453545298490).

12112011109978 is a wasteful number, since it uses less digits than its factorization.

12112011109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465846581168.

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

The spelling of 12112011109978 in words is "twelve trillion, one hundred twelve billion, eleven million, one hundred nine thousand, nine hundred seventy-eight".