120000221221 has 2 divisors, whose sum is σ = 120000221222. Its totient is φ = 120000221220.

The previous prime is 120000221207. The next prime is 120000221239. The reversal of 120000221221 is 122122000021.

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., 99153192996 + 20847028225 = 314886^2 + 144385^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000221221 - 2¹³ = 120000213029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120000261221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60000110610 + 60000110611.

It is an arithmetic number, because the mean of its divisors is an integer number (60000110611).

Almost surely, 2^120000221221 is an apocalyptic number.

It is an amenable number.

120000221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120000221221 is an equidigital number, since it uses as much as digits as its factorization.

120000221221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120000221221 its reverse (122122000021), we get a palindrome (242122221242).

The spelling of 120000221221 in words is "one hundred twenty billion, two hundred twenty-one thousand, two hundred twenty-one".