111201011020987 has 4 divisors (see below), whose sum is σ = 117742246963416. Its totient is φ = 104659775078560.

The previous prime is 111201011020973. The next prime is 111201011020991. The reversal of 111201011020987 is 789020110102111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111201011020987 - 2³⁹ = 110651255207099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111201011920987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3270617971189 + ... + 3270617971222.

It is an arithmetic number, because the mean of its divisors is an integer number (29435561740854).

Almost surely, 2^{111201011020987} is an apocalyptic number.

111201011020987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

111201011020987 is a deficient number, since it is larger than the sum of its proper divisors (6541235942429).

111201011020987 is an equidigital number, since it uses as much as digits as its factorization.

111201011020987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541235942428.

The product of its (nonzero) digits is 2016, while the sum is 34.

The spelling of 111201011020987 in words is "one hundred eleven trillion, two hundred one billion, eleven million, twenty thousand, nine hundred eighty-seven".