120340311021 has 24 divisors (see below), whose sum is σ = 198681364544. Its totient is φ = 68757465600.

The previous prime is 120340310983. The next prime is 120340311029. The reversal of 120340311021 is 120113043021.

120340311021 is a `hidden beast` number, since 12 + 0 + 340 + 311 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 120340311021 - 2¹⁹ = 120339786733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120340310985 and 120340311003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120340311029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420621 + ... + 646221.

Almost surely, 2^120340311021 is an apocalyptic number.

It is an amenable number.

120340311021 is a deficient number, since it is larger than the sum of its proper divisors (78341053523).

120340311021 is a wasteful number, since it uses less digits than its factorization.

120340311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234081 (or 234078 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 120340311021 its reverse (120113043021), we get a palindrome (240453354042).

The spelling of 120340311021 in words is "one hundred twenty billion, three hundred forty million, three hundred eleven thousand, twenty-one".