3121122221200 has 60 divisors (see below), whose sum is σ = 7506415206000. Its totient is φ = 1247130417280.

The previous prime is 3121122221179. The next prime is 3121122221201. The reversal of 3121122221200 is 21222211213.

It is not an unprimeable number, because it can be changed into a prime (3121122221201) 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 11 ways as a sum of consecutive naturals, for example, 3740950 + ... + 4498549.

It is an arithmetic number, because the mean of its divisors is an integer number (125106920100).

Almost surely, 2^{3121122221200} is an apocalyptic number.

It is an amenable number.

3121122221200 is an abundant number, since it is smaller than the sum of its proper divisors (4385292984800).

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

3121122221200 is a wasteful number, since it uses less digits than its factorization.

3121122221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8240464 (or 8240453 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 3121122221200 its reverse (21222211213), we get a palindrome (3142344432413).

The spelling of 3121122221200 in words is "three trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred".