212202101221 has 8 divisors (see below), whose sum is σ = 232786461600. Its totient is φ = 191833284240.

The previous prime is 212202101147. The next prime is 212202101257. The reversal of 212202101221 is 122101202212.

It is a happy number.

212202101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212202101221 - 2⁷ = 212202101093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212202101195 and 212202101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202101261) 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 7 ways as a sum of consecutive naturals, for example, 53883786 + ... + 53887723.

It is an arithmetic number, because the mean of its divisors is an integer number (29098307700).

Almost surely, 2^212202101221 is an apocalyptic number.

It is an amenable number.

212202101221 is a deficient number, since it is larger than the sum of its proper divisors (20584360379).

212202101221 is a wasteful number, since it uses less digits than its factorization.

212202101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107771699.

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

Adding to 212202101221 its reverse (122101202212), we get a palindrome (334303303433).

The spelling of 212202101221 in words is "two hundred twelve billion, two hundred two million, one hundred one thousand, two hundred twenty-one".