111112111001001 has 64 divisors (see below), whose sum is σ = 164025105463296. Its totient is φ = 66344940864000.

The previous prime is 111112111000927. The next prime is 111112111001027. The reversal of 111112111001001 is 100100111211111.

It is not a de Polignac number, because 111112111001001 - 2⁷ = 111112111000873 is a prime.

It is a super-2 number, since 2×111112111001001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111112111021001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 563141701 + ... + 563338973.

It is an arithmetic number, because the mean of its divisors is an integer number (2562892272864).

Almost surely, 2^{111112111001001} is an apocalyptic number.

111112111001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111112111001001 is a deficient number, since it is larger than the sum of its proper divisors (52912994462295).

111112111001001 is a wasteful number, since it uses less digits than its factorization.

111112111001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198222.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111112111001001 its reverse (100100111211111), we get a palindrome (211212222212112).

The spelling of 111112111001001 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred eleven million, one thousand, one".