211220320000 has 90 divisors (see below), whose sum is σ = 526851203648. Its totient is φ = 84488064000.

The previous prime is 211220319929. The next prime is 211220320013. The reversal of 211220320000 is 23022112.

It is a super-2 number, since 2×211220320000² (a number of 23 digits) contains 22 as substring.

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 9 ways as a sum of consecutive naturals, for example, 500064 + ... + 820063.

Almost surely, 2^211220320000 is an apocalyptic number.

211220320000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220320000 is an abundant number, since it is smaller than the sum of its proper divisors (315630883648).

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

211220320000 is an frugal number, since it uses more digits than its factorization.

211220320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320163 (or 1320134 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 211220320000 its reverse (23022112), we get a palindrome (211243342112).

The spelling of 211220320000 in words is "two hundred eleven billion, two hundred twenty million, three hundred twenty thousand".