3031125021 has 12 divisors (see below), whose sum is σ = 4385993820. Its totient is φ = 2017195200.

The previous prime is 3031124977. The next prime is 3031125049. The reversal of 3031125021 is 1205211303.

3031125021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 532224900 + 2498900121 = 23070^2 + 49989^2 .

It is not a de Polignac number, because 3031125021 - 2¹⁷ = 3030993949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3031124985 and 3031125003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031125821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290830 + ... + 301071.

It is an arithmetic number, because the mean of its divisors is an integer number (365499485).

Almost surely, 2^3031125021 is an apocalyptic number.

It is an amenable number.

3031125021 is a deficient number, since it is larger than the sum of its proper divisors (1354868799).

3031125021 is a wasteful number, since it uses less digits than its factorization.

3031125021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592476 (or 592473 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 3031125021 is about 55055.6538513530. The cubic root of 3031125021 is about 1447.2202027497.

Adding to 3031125021 its reverse (1205211303), we get a palindrome (4236336324).

The spelling of 3031125021 in words is "three billion, thirty-one million, one hundred twenty-five thousand, twenty-one".