120310000021 has 4 divisors (see below), whose sum is σ = 120310878892. Its totient is φ = 120309121152.

The previous prime is 120310000009. The next prime is 120310000049. The reversal of 120310000021 is 120000013021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 50236498225 + 70073501796 = 224135^2 + 264714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120310000021 is a prime.

It is a super-2 number, since 2×120310000021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120309999962 and 120310000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120310000001) 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, 184986 + ... + 524251.

It is an arithmetic number, because the mean of its divisors is an integer number (30077719723).

Almost surely, 2^120310000021 is an apocalyptic number.

It is an amenable number.

120310000021 is a deficient number, since it is larger than the sum of its proper divisors (878871).

120310000021 is an equidigital number, since it uses as much as digits as its factorization.

120310000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878870.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 120310000021 its reverse (120000013021), we get a palindrome (240310013042).

The spelling of 120310000021 in words is "one hundred twenty billion, three hundred ten million, twenty-one", and thus it is an aban number.