211200012020 has 48 divisors (see below), whose sum is σ = 444877770960. Its totient is φ = 84221792256.

The previous prime is 211200011993. The next prime is 211200012031. The reversal of 211200012020 is 20210002112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1337072356 + 209862939664 = 36566^2 + 458108^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211200011992 and 211200012010.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8777366 + ... + 8801394.

It is an arithmetic number, because the mean of its divisors is an integer number (9268286895).

Almost surely, 2^211200012020 is an apocalyptic number.

211200012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211200012020 is an abundant number, since it is smaller than the sum of its proper divisors (233677758940).

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

211200012020 is a wasteful number, since it uses less digits than its factorization.

211200012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25364 (or 25362 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 211200012020 its reverse (20210002112), we get a palindrome (231410014132).

The spelling of 211200012020 in words is "two hundred eleven billion, two hundred million, twelve thousand, twenty".