3203100123221 has 4 divisors (see below), whose sum is σ = 3203105050572. Its totient is φ = 3203095195872.

The previous prime is 3203100123217. The next prime is 3203100123233. The reversal of 3203100123221 is 1223210013023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2099789374225 + 1103310748996 = 1449065^2 + 1050386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3203100123221 - 2² = 3203100123217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3203100123193 and 3203100123202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3203100123271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307816 + ... + 2848961.

It is an arithmetic number, because the mean of its divisors is an integer number (800776262643).

Almost surely, 2^{3203100123221} is an apocalyptic number.

It is an amenable number.

3203100123221 is a deficient number, since it is larger than the sum of its proper divisors (4927351).

3203100123221 is an equidigital number, since it uses as much as digits as its factorization.

3203100123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4927350.

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

Adding to 3203100123221 its reverse (1223210013023), we get a palindrome (4426310136244).

The spelling of 3203100123221 in words is "three trillion, two hundred three billion, one hundred million, one hundred twenty-three thousand, two hundred twenty-one".