111020009986 has 4 divisors (see below), whose sum is σ = 166530014982. Its totient is φ = 55510004992.

The previous prime is 111020009983. The next prime is 111020009987. The reversal of 111020009986 is 689900020111.

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

It can be written as a sum of positive squares in only one way, i.e., 58358480625 + 52661529361 = 241575^2 + 229481^2 .

It is not an unprimeable number, because it can be changed into a prime (111020009983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27755002495 + ... + 27755002498.

Almost surely, 2^111020009986 is an apocalyptic number.

111020009986 is a deficient number, since it is larger than the sum of its proper divisors (55510004996).

111020009986 is an equidigital number, since it uses as much as digits as its factorization.

111020009986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55510004995.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 111020009986 in words is "one hundred eleven billion, twenty million, nine thousand, nine hundred eighty-six".