120122112821 has 2 divisors, whose sum is σ = 120122112822. Its totient is φ = 120122112820.

The previous prime is 120122112779. The next prime is 120122112833. The reversal of 120122112821 is 128211221021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98087976100 + 22034136721 = 313190^2 + 148439^2 .

It is a cyclic number.

It is not a de Polignac number, because 120122112821 - 2²² = 120117918517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120122112881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60061056410 + 60061056411.

It is an arithmetic number, because the mean of its divisors is an integer number (60061056411).

Almost surely, 2^120122112821 is an apocalyptic number.

It is an amenable number.

120122112821 is a deficient number, since it is larger than the sum of its proper divisors (1).

120122112821 is an equidigital number, since it uses as much as digits as its factorization.

120122112821 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 23.

Adding to 120122112821 its reverse (128211221021), we get a palindrome (248333333842).

The spelling of 120122112821 in words is "one hundred twenty billion, one hundred twenty-two million, one hundred twelve thousand, eight hundred twenty-one".