211020200021200 has 120 divisors (see below), whose sum is σ = 512218266979608. Its totient is φ = 83535336407040.

The previous prime is 211020200021143. The next prime is 211020200021237. The reversal of 211020200021200 is 2120002020112.

It is a happy number.

211020200021200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 754771738176 + 210265428283024 = 868776^2 + 14500532^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1731699474 + ... + 1731821326.

Almost surely, 2^{211020200021200} is an apocalyptic number.

211020200021200 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 211020200021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256109133489804).

211020200021200 is an abundant number, since it is smaller than the sum of its proper divisors (301198066958408).

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

211020200021200 is a wasteful number, since it uses less digits than its factorization.

211020200021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166601 (or 166590 counting only the distinct ones).

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

Adding to 211020200021200 its reverse (2120002020112), we get a palindrome (213140202041312).

The spelling of 211020200021200 in words is "two hundred eleven trillion, twenty billion, two hundred million, twenty-one thousand, two hundred".