111111000020 has 24 divisors (see below), whose sum is σ = 233648872800. Its totient is φ = 44384252832.

The previous prime is 111110999999. The next prime is 111111000041. The reversal of 111111000020 is 20000111111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111110999999) and next prime (111111000041).

It is a junction number, because it is equal to n+sod(n) for n = 111110999971 and 111111000007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3744050 + ... + 3773609.

It is an arithmetic number, because the mean of its divisors is an integer number (9735369700).

Almost surely, 2^111111000020 is an apocalyptic number.

111111000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111000020 is an abundant number, since it is smaller than the sum of its proper divisors (122537872780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111000020 is a wasteful number, since it uses less digits than its factorization.

111111000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518407 (or 7518405 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111111000020 its reverse (20000111111), we get a palindrome (131111111131).

The spelling of 111111000020 in words is "one hundred eleven billion, one hundred eleven million, twenty", and thus it is an aban number.