120113221302521 has 2 divisors, whose sum is σ = 120113221302522. Its totient is φ = 120113221302520.

The previous prime is 120113221302497. The next prime is 120113221302523. The reversal of 120113221302521 is 125203122311021.

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., 74901045302521 + 45212176000000 = 8654539^2 + 6724000^2 .

It is an emirp because it is prime and its reverse (125203122311021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120113221302521 - 2¹⁸ = 120113221040377 is a prime.

Together with 120113221302523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120113221302523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60056610651260 + 60056610651261.

It is an arithmetic number, because the mean of its divisors is an integer number (60056610651261).

Almost surely, 2^{120113221302521} is an apocalyptic number.

It is an amenable number.

120113221302521 is a deficient number, since it is larger than the sum of its proper divisors (1).

120113221302521 is an equidigital number, since it uses as much as digits as its factorization.

120113221302521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 120113221302521 its reverse (125203122311021), we get a palindrome (245316343613542).

The spelling of 120113221302521 in words is "one hundred twenty trillion, one hundred thirteen billion, two hundred twenty-one million, three hundred two thousand, five hundred twenty-one".