120202211221 has 2 divisors, whose sum is σ = 120202211222. Its totient is φ = 120202211220.

The previous prime is 120202211191. The next prime is 120202211317. The reversal of 120202211221 is 122112202021.

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., 117725158321 + 2477052900 = 343111^2 + 49770^2 .

It is a cyclic number.

It is not a de Polignac number, because 120202211221 - 2⁵ = 120202211189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120202211195 and 120202211204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120202218221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60101105610 + 60101105611.

It is an arithmetic number, because the mean of its divisors is an integer number (60101105611).

Almost surely, 2^120202211221 is an apocalyptic number.

It is an amenable number.

120202211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120202211221 is an equidigital number, since it uses as much as digits as its factorization.

120202211221 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 120202211221 its reverse (122112202021), we get a palindrome (242314413242).

The spelling of 120202211221 in words is "one hundred twenty billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".