211201122220 has 72 divisors (see below), whose sum is σ = 492335427024. Its totient is φ = 76039920000.

The previous prime is 211201122173. The next prime is 211201122221. The reversal of 211201122220 is 22221102112.

It is a happy number.

211201122220 is digitally balanced in base 2, 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 = 211201122194 and 211201122203.

It is not an unprimeable number, because it can be changed into a prime (211201122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187626 + ... + 676465.

It is an arithmetic number, because the mean of its divisors is an integer number (6837992042).

Almost surely, 2^211201122220 is an apocalyptic number.

211201122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211201122220 is an abundant number, since it is smaller than the sum of its proper divisors (281134304804).

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

211201122220 is a wasteful number, since it uses less digits than its factorization.

211201122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864223 (or 864210 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211201122220 its reverse (22221102112), we get a palindrome (233422224332).

The spelling of 211201122220 in words is "two hundred eleven billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty".