203103122021 has 8 divisors (see below), whose sum is σ = 204374375424. Its totient is φ = 201834034480.

The previous prime is 203103122009. The next prime is 203103122059. The reversal of 203103122021 is 120221301302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203103122021 - 2⁶ = 203103121957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203103122221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353126 + ... + 728631.

It is an arithmetic number, because the mean of its divisors is an integer number (25546796928).

Almost surely, 2^203103122021 is an apocalyptic number.

It is an amenable number.

203103122021 is a deficient number, since it is larger than the sum of its proper divisors (1271253403).

203103122021 is a wasteful number, since it uses less digits than its factorization.

203103122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082931.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203103122021 its reverse (120221301302), we get a palindrome (323324423323).

The spelling of 203103122021 in words is "two hundred three billion, one hundred three million, one hundred twenty-two thousand, twenty-one".