120821373 has 12 divisors (see below), whose sum is σ = 174876000. Its totient is φ = 80383176.

The previous prime is 120821359. The next prime is 120821387. The reversal of 120821373 is 373128021.

It is an interprime number because it is at equal distance from previous prime (120821359) and next prime (120821387).

It is not a de Polignac number, because 120821373 - 2⁵ = 120821341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120821303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8961 + ... + 17942.

It is an arithmetic number, because the mean of its divisors is an integer number (14573000).

Almost surely, 2^120821373 is an apocalyptic number.

It is an amenable number.

120821373 is a deficient number, since it is larger than the sum of its proper divisors (54054627).

120821373 is a wasteful number, since it uses less digits than its factorization.

120821373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27408 (or 27405 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 120821373 is about 10991.8775921132. The cubic root of 120821373 is about 494.3652347165.

Adding to 120821373 its reverse (373128021), we get a palindrome (493949394).

The spelling of 120821373 in words is "one hundred twenty million, eight hundred twenty-one thousand, three hundred seventy-three".