211201111220 has 24 divisors (see below), whose sum is σ = 483842546208. Its totient is φ = 76800404000.

The previous prime is 211201111193. The next prime is 211201111301. The reversal of 211201111220 is 22111102112.

211201111220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211201111195 and 211201111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480002306 + ... + 480002745.

It is an arithmetic number, because the mean of its divisors is an integer number (20160106092).

Almost surely, 2^211201111220 is an apocalyptic number.

211201111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211201111220 is an abundant number, since it is smaller than the sum of its proper divisors (272641434988).

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

211201111220 is a wasteful number, since it uses less digits than its factorization.

211201111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960005071 (or 960005069 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211201111220 its reverse (22111102112), we get a palindrome (233312213332).

The spelling of 211201111220 in words is "two hundred eleven billion, two hundred one million, one hundred eleven thousand, two hundred twenty".