3121031212 has 48 divisors (see below), whose sum is σ = 5964295680. Its totient is φ = 1420437312.

The previous prime is 3121031201. The next prime is 3121031213. The reversal of 3121031212 is 2121301213.

It is not an unprimeable number, because it can be changed into a prime (3121031213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1328623 + ... + 1330969.

It is an arithmetic number, because the mean of its divisors is an integer number (124256160).

Almost surely, 2^3121031212 is an apocalyptic number.

It is an amenable number.

3121031212 is a deficient number, since it is larger than the sum of its proper divisors (2843264468).

3121031212 is a wasteful number, since it uses less digits than its factorization.

3121031212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710 (or 2708 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3121031212 is about 55866.1902406097. The cubic root of 3121031212 is about 1461.3896838942.

Adding to 3121031212 its reverse (2121301213), we get a palindrome (5242332425).

The spelling of 3121031212 in words is "three billion, one hundred twenty-one million, thirty-one thousand, two hundred twelve".