111000211020020 has 36 divisors (see below), whose sum is σ = 271157658351300. Its totient is φ = 38057215206528.

The previous prime is 111000211020019. The next prime is 111000211020029. The reversal of 111000211020020 is 20020112000111.

It can be written as a sum of positive squares in 2 ways, for example, as 30894632190436 + 80105578829584 = 5558294^2 + 8950172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111000211019983 and 111000211020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000211020029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56632759745 + ... + 56632761704.

It is an arithmetic number, because the mean of its divisors is an integer number (7532157176425).

Almost surely, 2^{111000211020020} is an apocalyptic number.

111000211020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111000211020020 is an abundant number, since it is smaller than the sum of its proper divisors (160157447331280).

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

111000211020020 is a wasteful number, since it uses less digits than its factorization.

111000211020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113265521472 (or 113265521463 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111000211020020 its reverse (20020112000111), we get a palindrome (131020323020131).

The spelling of 111000211020020 in words is "one hundred eleven trillion, two hundred eleven million, twenty thousand, twenty".