120012221221 has 2 divisors, whose sum is σ = 120012221222. Its totient is φ = 120012221220.

The previous prime is 120012221213. The next prime is 120012221237. The reversal of 120012221221 is 122122210021.

It is a happy number.

It is an a-pointer prime, because the next prime (120012221237) can be obtained adding 120012221221 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90788318721 + 29223902500 = 301311^2 + 170950^2 .

It is a cyclic number.

It is not a de Polignac number, because 120012221221 - 2³ = 120012221213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120012221195 and 120012221204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120012221521) 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 as a sum of consecutive naturals, namely, 60006110610 + 60006110611.

It is an arithmetic number, because the mean of its divisors is an integer number (60006110611).

Almost surely, 2^120012221221 is an apocalyptic number.

It is an amenable number.

120012221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120012221221 is an equidigital number, since it uses as much as digits as its factorization.

120012221221 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 120012221221 its reverse (122122210021), we get a palindrome (242134431242).

The spelling of 120012221221 in words is "one hundred twenty billion, twelve million, two hundred twenty-one thousand, two hundred twenty-one".