120212210221 has 2 divisors, whose sum is σ = 120212210222. Its totient is φ = 120212210220.

The previous prime is 120212210219. The next prime is 120212210263. The reversal of 120212210221 is 122012212021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91573417321 + 28638792900 = 302611^2 + 169230^2 .

It is a cyclic number.

It is not a de Polignac number, because 120212210221 - 2¹ = 120212210219 is a prime.

Together with 120212210219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 120212210195 and 120212210204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120212210281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60106105110 + 60106105111.

It is an arithmetic number, because the mean of its divisors is an integer number (60106105111).

Almost surely, 2^120212210221 is an apocalyptic number.

It is an amenable number.

120212210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120212210221 is an equidigital number, since it uses as much as digits as its factorization.

120212210221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 120212210221 its reverse (122012212021), we get a palindrome (242224422242).

The spelling of 120212210221 in words is "one hundred twenty billion, two hundred twelve million, two hundred ten thousand, two hundred twenty-one".