120834821 has 2 divisors, whose sum is σ = 120834822. Its totient is φ = 120834820.

The previous prime is 120834817. The next prime is 120834823. The reversal of 120834821 is 128438021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114276100 + 6558721 = 10690^2 + 2561^2 .

It is a cyclic number.

It is not a de Polignac number, because 120834821 - 2² = 120834817 is a prime.

It is a super-2 number, since 2×120834821² = 29202107932204082, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 120834823, it forms a pair of twin primes.

It is a Chen 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 (120834823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60417410 + 60417411.

It is an arithmetic number, because the mean of its divisors is an integer number (60417411).

Almost surely, 2^120834821 is an apocalyptic number.

It is an amenable number.

120834821 is a deficient number, since it is larger than the sum of its proper divisors (1).

120834821 is an equidigital number, since it uses as much as digits as its factorization.

120834821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 120834821 is about 10992.4892995172. The cubic root of 120834821 is about 494.3835757789.

The spelling of 120834821 in words is "one hundred twenty million, eight hundred thirty-four thousand, eight hundred twenty-one".