201212201120220 has 36 divisors (see below), whose sum is σ = 610343676731880. Its totient is φ = 53656586965344.

The previous prime is 201212201120213. The next prime is 201212201120221. The reversal of 201212201120220 is 22021102212102.

It is a happy number.

201212201120220 is a `hidden beast` number, since 2 + 0 + 121 + 2 + 201 + 120 + 220 = 666.

201212201120220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201212201120193 and 201212201120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212201120221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558922780710 + ... + 558922781069.

It is an arithmetic number, because the mean of its divisors is an integer number (16953991020330).

Almost surely, 2^{201212201120220} is an apocalyptic number.

201212201120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212201120220 is an abundant number, since it is smaller than the sum of its proper divisors (409131475611660).

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

201212201120220 is a wasteful number, since it uses less digits than its factorization.

201212201120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117845561794 (or 1117845561789 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201212201120220 its reverse (22021102212102), we get a palindrome (223233303332322).

The spelling of 201212201120220 in words is "two hundred one trillion, two hundred twelve billion, two hundred one million, one hundred twenty thousand, two hundred twenty".