120310030021 has 4 divisors (see below), whose sum is σ = 123561652492. Its totient is φ = 117058407552.

The previous prime is 120310030007. The next prime is 120310030037. The reversal of 120310030021 is 120030013021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113898825121 + 6411204900 = 337489^2 + 80070^2 .

It is a cyclic number.

It is not a de Polignac number, because 120310030021 - 2⁵ = 120310029989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120310029983 and 120310030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120310030091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625811180 + ... + 1625811253.

It is an arithmetic number, because the mean of its divisors is an integer number (30890413123).

Almost surely, 2^120310030021 is an apocalyptic number.

It is an amenable number.

120310030021 is a deficient number, since it is larger than the sum of its proper divisors (3251622471).

120310030021 is an equidigital number, since it uses as much as digits as its factorization.

120310030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251622470.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 120310030021 its reverse (120030013021), we get a palindrome (240340043042).

The spelling of 120310030021 in words is "one hundred twenty billion, three hundred ten million, thirty thousand, twenty-one".