1111221121986 has 24 divisors (see below), whose sum is σ = 2407956370560. Its totient is φ = 370359255096.

The previous prime is 1111221121973. The next prime is 1111221121993. The reversal of 1111221121986 is 6891211221111.

It is a self number, because there is not a number n which added to its sum of digits gives 1111221121986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3838590 + ... + 4117913.

It is an arithmetic number, because the mean of its divisors is an integer number (100331515440).

Almost surely, 2^{1111221121986} is an apocalyptic number.

1111221121986 is an abundant number, since it is smaller than the sum of its proper divisors (1296735248574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111221121986 is a wasteful number, since it uses less digits than its factorization.

1111221121986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964270 (or 7964267 counting only the distinct ones).

The product of its digits is 3456, while the sum is 36.

The spelling of 1111221121986 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, nine hundred eighty-six".