211221210201100 has 144 divisors (see below), whose sum is σ = 507424610246400. Its totient is φ = 75677890464000.

The previous prime is 211221210201077. The next prime is 211221210201137. The reversal of 211221210201100 is 1102012122112.

It is a super-2 number, since 2×211221210201100² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16541305 + ... + 26382895.

It is an arithmetic number, because the mean of its divisors is an integer number (3523782015600).

Almost surely, 2^{211221210201100} is an apocalyptic number.

211221210201100 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 211221210201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253712305123200).

211221210201100 is an abundant number, since it is smaller than the sum of its proper divisors (296203400045300).

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

211221210201100 is a wasteful number, since it uses less digits than its factorization.

211221210201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9841904 (or 9841897 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211221210201100 its reverse (1102012122112), we get a palindrome (212323222323212).

The spelling of 211221210201100 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, two hundred one thousand, one hundred".