203030220121 has 4 divisors (see below), whose sum is σ = 213716021200. Its totient is φ = 192344419044.

The previous prime is 203030220037. The next prime is 203030220167. The reversal of 203030220121 is 121022030302.

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.

It is not a de Polignac number, because 203030220121 - 2⁷ = 203030219993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203030220095 and 203030220104.

It is not an unprimeable number, because it can be changed into a prime (203030220191) 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, 5342900511 + ... + 5342900548.

It is an arithmetic number, because the mean of its divisors is an integer number (53429005300).

Almost surely, 2^203030220121 is an apocalyptic number.

It is an amenable number.

203030220121 is a deficient number, since it is larger than the sum of its proper divisors (10685801079).

203030220121 is a wasteful number, since it uses less digits than its factorization.

203030220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685801078.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 203030220121 its reverse (121022030302), we get a palindrome (324052250423).

The spelling of 203030220121 in words is "two hundred three billion, thirty million, two hundred twenty thousand, one hundred twenty-one".