3121120212 has 48 divisors (see below), whose sum is σ = 8325757440. Its totient is φ = 891451872.

The previous prime is 3121120199. The next prime is 3121120231. The reversal of 3121120212 is 2120211213.

It is a junction number, because it is equal to n+sod(n) for n = 3121120191 and 3121120200.

It is a congruent number.

It is an unprimeable number.

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, 428739 + ... + 435957.

It is an arithmetic number, because the mean of its divisors is an integer number (173453280).

Almost surely, 2^3121120212 is an apocalyptic number.

It is an amenable number.

3121120212 is an abundant number, since it is smaller than the sum of its proper divisors (5204637228).

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

3121120212 is a wasteful number, since it uses less digits than its factorization.

3121120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380 (or 12378 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3121120212 is about 55866.9867811036. The cubic root of 3121120212 is about 1461.4035748635.

Adding to 3121120212 its reverse (2120211213), we get a palindrome (5241331425).

The spelling of 3121120212 in words is "three billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twelve".