211105343020 has 96 divisors (see below), whose sum is σ = 521116223040. Its totient is φ = 70820904960.

The previous prime is 211105342993. The next prime is 211105343027. The reversal of 211105343020 is 20343501112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211105342982 and 211105343000.

It is not an unprimeable number, because it can be changed into a prime (211105343027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5337076 + ... + 5376484.

It is an arithmetic number, because the mean of its divisors is an integer number (5428293990).

Almost surely, 2^211105343020 is an apocalyptic number.

211105343020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211105343020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260558111520).

211105343020 is an abundant number, since it is smaller than the sum of its proper divisors (310010880020).

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

211105343020 is a wasteful number, since it uses less digits than its factorization.

211105343020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41315 (or 41313 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 211105343020 its reverse (20343501112), we get a palindrome (231448844132).

The spelling of 211105343020 in words is "two hundred eleven billion, one hundred five million, three hundred forty-three thousand, twenty".