3123130212 has 18 divisors (see below), whose sum is σ = 7894579238. Its totient is φ = 1041043392.

The previous prime is 3123130211. The next prime is 3123130217. The reversal of 3123130212 is 2120313213.

It can be written as a sum of positive squares in only one way, i.e., 2684897856 + 438232356 = 51816^2 + 20934^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×3123130212² = 19507884642214329888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (3123130211) 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 5 ways as a sum of consecutive naturals, for example, 43376773 + ... + 43376844.

Almost surely, 2^3123130212 is an apocalyptic number.

It is an amenable number.

3123130212 is an abundant number, since it is smaller than the sum of its proper divisors (4771449026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3123130212 is a wasteful number, since it uses less digits than its factorization.

3123130212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86753627 (or 86753622 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3123130212 is about 55884.9730428494. The cubic root of 3123130212 is about 1461.7172219565.

Adding to 3123130212 its reverse (2120313213), we get a palindrome (5243443425).

The spelling of 3123130212 in words is "three billion, one hundred twenty-three million, one hundred thirty thousand, two hundred twelve".