120012222221 has 2 divisors, whose sum is σ = 120012222222. Its totient is φ = 120012222220.

The previous prime is 120012222179. The next prime is 120012222241. The reversal of 120012222221 is 122222210021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83630856100 + 36381366121 = 289190^2 + 190739^2 .

It is an emirp because it is prime and its reverse (122222210021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120012222221 - 2⁶ = 120012222157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120012222221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120012222241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60006111110 + 60006111111.

It is an arithmetic number, because the mean of its divisors is an integer number (60006111111).

Almost surely, 2^120012222221 is an apocalyptic number.

It is an amenable number.

120012222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120012222221 is an equidigital number, since it uses as much as digits as its factorization.

120012222221 is an evil number, because the sum of its binary digits is even.

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

Adding to 120012222221 its reverse (122222210021), we get a palindrome (242234432242).

The spelling of 120012222221 in words is "one hundred twenty billion, twelve million, two hundred twenty-two thousand, two hundred twenty-one".