3123130021 has 8 divisors (see below), whose sum is σ = 3438309600. Its totient is φ = 2813160240.

The previous prime is 3123130009. The next prime is 3123130051. The reversal of 3123130021 is 1200313213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3123130021 - 2¹³ = 3123121829 is a prime.

It is a super-2 number, since 2×3123130021² = 19507882256142920882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3123129977 and 3123130004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123130001) 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 7 ways as a sum of consecutive naturals, for example, 1301191 + ... + 1303588.

It is an arithmetic number, because the mean of its divisors is an integer number (429788700).

Almost surely, 2^3123130021 is an apocalyptic number.

It is an amenable number.

3123130021 is a deficient number, since it is larger than the sum of its proper divisors (315179579).

3123130021 is a wasteful number, since it uses less digits than its factorization.

3123130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604899.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 3123130021 is about 55884.9713339821. The cubic root of 3123130021 is about 1461.7171921587.

Adding to 3123130021 its reverse (1200313213), we get a palindrome (4323443234).

The spelling of 3123130021 in words is "three billion, one hundred twenty-three million, one hundred thirty thousand, twenty-one".