211110200000020 has 24 divisors (see below), whose sum is σ = 450599148199368. Its totient is φ = 83059750819200.

The previous prime is 211110199999943. The next prime is 211110200000023. The reversal of 211110200000020 is 20000002011112.

It can be written as a sum of positive squares in 4 ways, for example, as 7142331080196 + 203967868919824 = 2672514^2 + 14281732^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 211110199999952 and 211110200000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211110200000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86520572551 + ... + 86520574990.

It is an arithmetic number, because the mean of its divisors is an integer number (18774964508307).

Almost surely, 2^{211110200000020} is an apocalyptic number.

211110200000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211110200000020 is an abundant number, since it is smaller than the sum of its proper divisors (239488948199348).

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

211110200000020 is a wasteful number, since it uses less digits than its factorization.

211110200000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173041147611 (or 173041147609 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211110200000020 its reverse (20000002011112), we get a palindrome (231110202011132).

The spelling of 211110200000020 in words is "two hundred eleven trillion, one hundred ten billion, two hundred million, twenty", and thus it is an aban number.