201111221986 has 8 divisors (see below), whose sum is σ = 301987416924. Its totient is φ = 100448749680.

The previous prime is 201111221981. The next prime is 201111221989. The reversal of 201111221986 is 689122111102.

It can be written as a sum of positive squares in 2 ways, for example, as 169357763961 + 31753458025 = 411531^2 + 178195^2 .

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

It is not an unprimeable number, because it can be changed into a prime (201111221981) 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, 53428305 + ... + 53432068.

Almost surely, 2^201111221986 is an apocalyptic number.

201111221986 is a deficient number, since it is larger than the sum of its proper divisors (100876194938).

201111221986 is a wasteful number, since it uses less digits than its factorization.

201111221986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106861316.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 201111221986 in words is "two hundred one billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred eighty-six".