111111020000001 has 16 divisors (see below), whose sum is σ = 188124478307200. Its totient is φ = 63492011428464.

The previous prime is 111111019999981. The next prime is 111111020000023. The reversal of 111111020000001 is 100000020111111.

It is not a de Polignac number, because 111111020000001 - 2³¹ = 111108872516353 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111020000801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293944497166 + ... + 293944497543.

It is an arithmetic number, because the mean of its divisors is an integer number (11757779894200).

Almost surely, 2^{111111020000001} is an apocalyptic number.

It is an amenable number.

111111020000001 is a deficient number, since it is larger than the sum of its proper divisors (77013458307199).

111111020000001 is an equidigital number, since it uses as much as digits as its factorization.

111111020000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587888994725 (or 587888994719 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111111020000001 its reverse (100000020111111), we get a palindrome (211111040111112).

The spelling of 111111020000001 in words is "one hundred eleven trillion, one hundred eleven billion, twenty million, one", and thus it is an aban number.