3121203121212 has 48 divisors (see below), whose sum is σ = 8201167156224. Its totient is φ = 915308832000.

The previous prime is 3121203121207. The next prime is 3121203121249. The reversal of 3121203121212 is 2121213021213.

It is a congruent number.

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, 381374589 + ... + 381382772.

It is an arithmetic number, because the mean of its divisors is an integer number (170857649088).

Almost surely, 2^{3121203121212} is an apocalyptic number.

It is an amenable number.

3121203121212 is an abundant number, since it is smaller than the sum of its proper divisors (5079964035012).

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

3121203121212 is a wasteful number, since it uses less digits than its factorization.

3121203121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762757410 (or 762757408 counting only the distinct ones).

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

Adding to 3121203121212 its reverse (2121213021213), we get a palindrome (5242416142425).

Subtracting from 3121203121212 its reverse (2121213021213), we obtain a palindrome (999990099999).

The spelling of 3121203121212 in words is "three trillion, one hundred twenty-one billion, two hundred three million, one hundred twenty-one thousand, two hundred twelve".