211100122020 has 24 divisors (see below), whose sum is σ = 591080341824. Its totient is φ = 56293365856.

The previous prime is 211100122007. The next prime is 211100122039. The reversal of 211100122020 is 20221001112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 211100121987 and 211100122005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1759167624 + ... + 1759167743.

It is an arithmetic number, because the mean of its divisors is an integer number (24628347576).

Almost surely, 2^211100122020 is an apocalyptic number.

211100122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211100122020 is an abundant number, since it is smaller than the sum of its proper divisors (379980219804).

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

211100122020 is a wasteful number, since it uses less digits than its factorization.

211100122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518335379 (or 3518335377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211100122020 its reverse (20221001112), we get a palindrome (231321123132).

The spelling of 211100122020 in words is "two hundred eleven billion, one hundred million, one hundred twenty-two thousand, twenty".