120822781 has 2 divisors, whose sum is σ = 120822782. Its totient is φ = 120822780.

The previous prime is 120822773. The next prime is 120822799. The reversal of 120822781 is 187228021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 37100281 = 9150^2 + 6091^2 .

It is a cyclic number.

It is not a de Polignac number, because 120822781 - 2³ = 120822773 is a prime.

It is a super-2 number, since 2×120822781² = 29196288817147922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120822701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60411390 + 60411391.

It is an arithmetic number, because the mean of its divisors is an integer number (60411391).

Almost surely, 2^120822781 is an apocalyptic number.

It is an amenable number.

120822781 is a deficient number, since it is larger than the sum of its proper divisors (1).

120822781 is an equidigital number, since it uses as much as digits as its factorization.

120822781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 120822781 is about 10991.9416392192. The cubic root of 120822781 is about 494.3671550819.

The spelling of 120822781 in words is "one hundred twenty million, eight hundred twenty-two thousand, seven hundred eighty-one".