201220322212 has 144 divisors (see below), whose sum is σ = 446175314928. Its totient is φ = 78699479040.

The previous prime is 201220322153. The next prime is 201220322221. The reversal of 201220322212 is 212223022102.

It can be written as a sum of positive squares in 8 ways, for example, as 29249208576 + 171971113636 = 171024^2 + 414694^2 .

It is a super-2 number, since 2×201220322212² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201220322212.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96693012 + ... + 96695092.

It is an arithmetic number, because the mean of its divisors is an integer number (3098439687).

Almost surely, 2^201220322212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220322212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223087657464).

201220322212 is an abundant number, since it is smaller than the sum of its proper divisors (244954992716).

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

201220322212 is a wasteful number, since it uses less digits than its factorization.

201220322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526 (or 2517 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 201220322212 its reverse (212223022102), we get a palindrome (413443344314).

The spelling of 201220322212 in words is "two hundred one billion, two hundred twenty million, three hundred twenty-two thousand, two hundred twelve".