120016359821 has 2 divisors, whose sum is σ = 120016359822. Its totient is φ = 120016359820.

The previous prime is 120016359797. The next prime is 120016359833. The reversal of 120016359821 is 128953610021.

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., 96118600900 + 23897758921 = 310030^2 + 154589^2 .

It is a cyclic number.

It is not a de Polignac number, because 120016359821 - 2³⁴ = 102836490637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120016359871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60008179910 + 60008179911.

It is an arithmetic number, because the mean of its divisors is an integer number (60008179911).

Almost surely, 2^120016359821 is an apocalyptic number.

It is an amenable number.

120016359821 is a deficient number, since it is larger than the sum of its proper divisors (1).

120016359821 is an equidigital number, since it uses as much as digits as its factorization.

120016359821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

Adding to 120016359821 its reverse (128953610021), we get a palindrome (248969969842).

The spelling of 120016359821 in words is "one hundred twenty billion, sixteen million, three hundred fifty-nine thousand, eight hundred twenty-one".