3123321100220 has 48 divisors (see below), whose sum is σ = 6720990546816. Its totient is φ = 1218486720000.

The previous prime is 3123321100177. The next prime is 3123321100243. The reversal of 3123321100220 is 220011233213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3123321100192 and 3123321100201.

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, 2129885 + ... + 3283755.

It is an arithmetic number, because the mean of its divisors is an integer number (140020636392).

Almost surely, 2^{3123321100220} is an apocalyptic number.

It is an amenable number.

3123321100220 is an abundant number, since it is smaller than the sum of its proper divisors (3597669446596).

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

3123321100220 is a wasteful number, since it uses less digits than its factorization.

3123321100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157222 (or 1157220 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 3123321100220 its reverse (220011233213), we get a palindrome (3343332333433).

The spelling of 3123321100220 in words is "three trillion, one hundred twenty-three billion, three hundred twenty-one million, one hundred thousand, two hundred twenty".