120202220212121 has 2 divisors, whose sum is σ = 120202220212122. Its totient is φ = 120202220212120.

The previous prime is 120202220212111. The next prime is 120202220212213. The reversal of 120202220212121 is 121212022202021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70238881386496 + 49963338825625 = 8380864^2 + 7068475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120202220212121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120202220212093 and 120202220212102.

It is not a weakly prime, because it can be changed into another prime (120202220212111) 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, 60101110106060 + 60101110106061.

It is an arithmetic number, because the mean of its divisors is an integer number (60101110106061).

Almost surely, 2^{120202220212121} is an apocalyptic number.

It is an amenable number.

120202220212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120202220212121 is an equidigital number, since it uses as much as digits as its factorization.

120202220212121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 120202220212121 its reverse (121212022202021), we get a palindrome (241414242414142).

The spelling of 120202220212121 in words is "one hundred twenty trillion, two hundred two billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".