212202220121 has 8 divisors (see below), whose sum is σ = 213884067840. Its totient is φ = 210520543968.

The previous prime is 212202220037. The next prime is 212202220127. The reversal of 212202220121 is 121022202212.

It is a happy number.

212202220121 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 a de Polignac number, because none of the positive numbers 2^k-212202220121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212202220121.

It is not an unprimeable number, because it can be changed into a prime (212202220127) 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, 3788165 + ... + 3843773.

It is an arithmetic number, because the mean of its divisors is an integer number (26735508480).

Almost surely, 2^212202220121 is an apocalyptic number.

It is an amenable number.

212202220121 is a deficient number, since it is larger than the sum of its proper divisors (1681847719).

212202220121 is a wasteful number, since it uses less digits than its factorization.

212202220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85783.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212202220121 its reverse (121022202212), we get a palindrome (333224422333).

The spelling of 212202220121 in words is "two hundred twelve billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".