3123021121212 has 48 divisors (see below), whose sum is σ = 7321294467200. Its totient is φ = 1036125784512.

The previous prime is 3123021121147. The next prime is 3123021121217. The reversal of 3123021121212 is 2121211203213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123021121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609203 + ... + 2972469.

Almost surely, 2^{3123021121212} is an apocalyptic number.

It is an amenable number.

3123021121212 is an abundant number, since it is smaller than the sum of its proper divisors (4198273345988).

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

3123021121212 is a wasteful number, since it uses less digits than its factorization.

3123021121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364170 (or 1364168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 3123021121212 its reverse (2121211203213), we get a palindrome (5244232324425).

The spelling of 3123021121212 in words is "three trillion, one hundred twenty-three billion, twenty-one million, one hundred twenty-one thousand, two hundred twelve".