211323001220 has 48 divisors (see below), whose sum is σ = 444705811200. Its totient is φ = 84352707840.

The previous prime is 211323001187. The next prime is 211323001273. The reversal of 211323001220 is 22100323112.

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, 24743711 + ... + 24752249.

It is an arithmetic number, because the mean of its divisors is an integer number (9264704400).

Almost surely, 2^211323001220 is an apocalyptic number.

211323001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211323001220 is an abundant number, since it is smaller than the sum of its proper divisors (233382809980).

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

211323001220 is a wasteful number, since it uses less digits than its factorization.

211323001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10988 (or 10986 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 211323001220 its reverse (22100323112), we get a palindrome (233423324332).

The spelling of 211323001220 in words is "two hundred eleven billion, three hundred twenty-three million, one thousand, two hundred twenty".