111001011001101 has 12 divisors (see below), whose sum is σ = 172668239335228. Its totient is φ = 68308314462144.

The previous prime is 111001011001073. The next prime is 111001011001121. The reversal of 111001011001101 is 101100110100111.

It can be written as a sum of positive squares in 2 ways, for example, as 45777199833225 + 65223811167876 = 6765885^2 + 8076126^2 .

It is not a de Polignac number, because 111001011001101 - 2¹⁸ = 111001010738957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001011001121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 474363294760 + ... + 474363294993.

Almost surely, 2^{111001011001101} is an apocalyptic number.

It is an amenable number.

111001011001101 is a deficient number, since it is larger than the sum of its proper divisors (61667228334127).

111001011001101 is a wasteful number, since it uses less digits than its factorization.

111001011001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948726589772 (or 948726589769 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111001011001101 its reverse (101100110100111), we get a palindrome (212101121101212).

The spelling of 111001011001101 in words is "one hundred eleven trillion, one billion, eleven million, one thousand, one hundred one".