111001100001001 has 24 divisors (see below), whose sum is σ = 129369970207296. Its totient is φ = 94962489098400.

The previous prime is 111001100000969. The next prime is 111001100001017. The reversal of 111001100001001 is 100100001100111.

It is a happy number.

It is not a de Polignac number, because 111001100001001 - 2⁵ = 111001100000969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (111001100001301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70912150 + ... + 72460576.

It is an arithmetic number, because the mean of its divisors is an integer number (5390415425304).

Almost surely, 2^{111001100001001} is an apocalyptic number.

It is an amenable number.

111001100001001 is a deficient number, since it is larger than the sum of its proper divisors (18368870206295).

111001100001001 is a wasteful number, since it uses less digits than its factorization.

111001100001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551229 (or 1551222 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 111001100001001 its reverse (100100001100111), we get a palindrome (211101101101112).

The spelling of 111001100001001 in words is "one hundred eleven trillion, one billion, one hundred million, one thousand, one".