201221232212 has 192 divisors, whose sum is σ = 486225911808. Its totient is φ = 70326144000.

The previous prime is 201221232193. The next prime is 201221232389. The reversal of 201221232212 is 212232122102.

It is a super-3 number, since 3×201221232212³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44486183 + ... + 44490705.

It is an arithmetic number, because the mean of its divisors is an integer number (2532426624).

Almost surely, 2^201221232212 is an apocalyptic number.

201221232212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201221232212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243112955904).

201221232212 is an abundant number, since it is smaller than the sum of its proper divisors (285004679596).

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

201221232212 is a wasteful number, since it uses less digits than its factorization.

201221232212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 201221232212 its reverse (212232122102), we get a palindrome (413453354314).

The spelling of 201221232212 in words is "two hundred one billion, two hundred twenty-one million, two hundred thirty-two thousand, two hundred twelve".