1011221111986 has 16 divisors (see below), whose sum is σ = 1536964976736. Its totient is φ = 498936226816.

The previous prime is 1011221111977. The next prime is 1011221111987. The reversal of 1011221111986 is 6891111221101.

It is a super-3 number, since 3×1011221111986³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011221111987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9138256 + ... + 9248251.

It is an arithmetic number, because the mean of its divisors is an integer number (96060311046).

Almost surely, 2^{1011221111986} is an apocalyptic number.

1011221111986 is a deficient number, since it is larger than the sum of its proper divisors (525743864750).

1011221111986 is a wasteful number, since it uses less digits than its factorization.

1011221111986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18386873.

The product of its (nonzero) digits is 1728, while the sum is 34.

The spelling of 1011221111986 in words is "one trillion, eleven billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred eighty-six".