203020123321 has 4 divisors (see below), whose sum is σ = 203029256592. Its totient is φ = 203010990052.

The previous prime is 203020123259. The next prime is 203020123343. The reversal of 203020123321 is 123321020302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123321020302 = 2 ⋅61660510151.

It is a cyclic number.

It is not a de Polignac number, because 203020123321 - 2¹⁹ = 203019599033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203020123921) 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, 4533211 + ... + 4577776.

It is an arithmetic number, because the mean of its divisors is an integer number (50757314148).

Almost surely, 2^203020123321 is an apocalyptic number.

It is an amenable number.

203020123321 is a deficient number, since it is larger than the sum of its proper divisors (9133271).

203020123321 is an equidigital number, since it uses as much as digits as its factorization.

203020123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9133270.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203020123321 its reverse (123321020302), we get a palindrome (326341143623).

The spelling of 203020123321 in words is "two hundred three billion, twenty million, one hundred twenty-three thousand, three hundred twenty-one".