203122320403 has 4 divisors (see below), whose sum is σ = 203123580400. Its totient is φ = 203121060408.

The previous prime is 203122320397. The next prime is 203122320409. The reversal of 203122320403 is 304023221302.

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

It is an interprime number because it is at equal distance from previous prime (203122320397) and next prime (203122320409).

It is a cyclic number.

It is not a de Polignac number, because 203122320403 - 2¹⁷ = 203122189331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203122320409) 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, 345300 + ... + 724897.

It is an arithmetic number, because the mean of its divisors is an integer number (50780895100).

Almost surely, 2^203122320403 is an apocalyptic number.

203122320403 is a deficient number, since it is larger than the sum of its proper divisors (1259997).

203122320403 is a wasteful number, since it uses less digits than its factorization.

203122320403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259996.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 203122320403 its reverse (304023221302), we get a palindrome (507145541705).

The spelling of 203122320403 in words is "two hundred three billion, one hundred twenty-two million, three hundred twenty thousand, four hundred three".