111121111101020 has 48 divisors (see below), whose sum is σ = 234932185893888. Its totient is φ = 44147982446400.

The previous prime is 111121111101019. The next prime is 111121111101047. The reversal of 111121111101020 is 20101111121111.

It is a junction number, because it is equal to n+sod(n) for n = 111121111100986 and 111121111101004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19347299 + ... + 24424581.

It is an arithmetic number, because the mean of its divisors is an integer number (4894420539456).

Almost surely, 2^{111121111101020} is an apocalyptic number.

111121111101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121111101020 is an abundant number, since it is smaller than the sum of its proper divisors (123811074792868).

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

111121111101020 is a wasteful number, since it uses less digits than its factorization.

111121111101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084690 (or 5084688 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 111121111101020 its reverse (20101111121111), we get a palindrome (131222222222131).

The spelling of 111121111101020 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred eleven million, one hundred one thousand, twenty".