221001202212 has 48 divisors (see below), whose sum is σ = 600456108672. Its totient is φ = 61951818240.

The previous prime is 221001202211. The next prime is 221001202241. The reversal of 221001202212 is 212202100122.

221001202212 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 = 221001202191 and 221001202200.

It is not an unprimeable number, because it can be changed into a prime (221001202211) 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 15 ways as a sum of consecutive naturals, for example, 24815989 + ... + 24824892.

It is an arithmetic number, because the mean of its divisors is an integer number (12509502264).

Almost surely, 2^221001202212 is an apocalyptic number.

It is an amenable number.

221001202212 is an abundant number, since it is smaller than the sum of its proper divisors (379454906460).

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

221001202212 is a wasteful number, since it uses less digits than its factorization.

221001202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49640948 (or 49640946 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221001202212 its reverse (212202100122), we get a palindrome (433203302334).

The spelling of 221001202212 in words is "two hundred twenty-one billion, one million, two hundred two thousand, two hundred twelve".