123020120221 has 2 divisors, whose sum is σ = 123020120222. Its totient is φ = 123020120220.

The previous prime is 123020120191. The next prime is 123020120227. The reversal of 123020120221 is 122021020321.

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., 103886314596 + 19133805625 = 322314^2 + 138325^2 .

It is a cyclic number.

It is not a de Polignac number, because 123020120221 - 2⁹ = 123020119709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123020120195 and 123020120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123020120227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510060110 + 61510060111.

It is an arithmetic number, because the mean of its divisors is an integer number (61510060111).

Almost surely, 2^123020120221 is an apocalyptic number.

It is an amenable number.

123020120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123020120221 is an equidigital number, since it uses as much as digits as its factorization.

123020120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 123020120221 its reverse (122021020321), we get a palindrome (245041140542).

The spelling of 123020120221 in words is "one hundred twenty-three billion, twenty million, one hundred twenty thousand, two hundred twenty-one".