211200122020 has 24 divisors (see below), whose sum is σ = 443528931384. Its totient is φ = 84478396416.

The previous prime is 211200122011. The next prime is 211200122057. The reversal of 211200122020 is 20221002112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10806018304 + 200394103716 = 103952^2 + 447654^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803082 + ... + 1916638.

It is an arithmetic number, because the mean of its divisors is an integer number (18480372141).

Almost surely, 2^211200122020 is an apocalyptic number.

211200122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211200122020 is an abundant number, since it is smaller than the sum of its proper divisors (232328809364).

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

211200122020 is a wasteful number, since it uses less digits than its factorization.

211200122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206559 (or 206557 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211200122020 its reverse (20221002112), we get a palindrome (231421124132).

The spelling of 211200122020 in words is "two hundred eleven billion, two hundred million, one hundred twenty-two thousand, twenty".