2203123220321 has 4 divisors (see below), whose sum is σ = 2204610813444. Its totient is φ = 2201635627200.

The previous prime is 2203123220297. The next prime is 2203123220327. The reversal of 2203123220321 is 1230223213022.

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 786937539025 + 1416185681296 = 887095^2 + 1190036^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203123220321 - 2²⁶ = 2203056111457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2203123220327) 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, 743794340 + ... + 743797301.

It is an arithmetic number, because the mean of its divisors is an integer number (551152703361).

Almost surely, 2^{2203123220321} is an apocalyptic number.

It is an amenable number.

2203123220321 is a deficient number, since it is larger than the sum of its proper divisors (1487593123).

2203123220321 is a wasteful number, since it uses less digits than its factorization.

2203123220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487593122.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 2203123220321 its reverse (1230223213022), we get a palindrome (3433346433343).

The spelling of 2203123220321 in words is "two trillion, two hundred three billion, one hundred twenty-three million, two hundred twenty thousand, three hundred twenty-one".