3121011212 has 48 divisors (see below), whose sum is σ = 6390316800. Its totient is φ = 1318599360.

The previous prime is 3121011191. The next prime is 3121011221. The reversal of 3121011212 is 2121101213.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9089 + ... + 79527.

It is an arithmetic number, because the mean of its divisors is an integer number (133131600).

Almost surely, 2^3121011212 is an apocalyptic number.

It is an amenable number.

3121011212 is an abundant number, since it is smaller than the sum of its proper divisors (3269305588).

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

3121011212 is a wasteful number, since it uses less digits than its factorization.

3121011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70526 (or 70524 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 3121011212 is about 55866.0112411831. The cubic root of 3121011212 is about 1461.3865622918.

Adding to 3121011212 its reverse (2121101213), we get a palindrome (5242112425).

Subtracting from 3121011212 its reverse (2121101213), we obtain a palindrome (999909999).

It can be divided in two parts, 312101 and 1212, that added together give a palindrome (313313).

The spelling of 3121011212 in words is "three billion, one hundred twenty-one million, eleven thousand, two hundred twelve".