3121222320220 has 48 divisors (see below), whose sum is σ = 6753279512448. Its totient is φ = 1211199644160.

The previous prime is 3121222320199. The next prime is 3121222320253. The reversal of 3121222320220 is 220232221213.

It is a junction number, because it is equal to n+sod(n) for n = 3121222320191 and 3121222320200.

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, 17434084 + ... + 17612203.

It is an arithmetic number, because the mean of its divisors is an integer number (140693323176).

Almost surely, 2^{3121222320220} is an apocalyptic number.

It is an amenable number.

3121222320220 is an abundant number, since it is smaller than the sum of its proper divisors (3632057192228).

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

3121222320220 is a wasteful number, since it uses less digits than its factorization.

3121222320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35046430 (or 35046428 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 3121222320220 its reverse (220232221213), we get a palindrome (3341454541433).

The spelling of 3121222320220 in words is "three trillion, one hundred twenty-one billion, two hundred twenty-two million, three hundred twenty thousand, two hundred twenty".