203121120113 has 8 divisors (see below), whose sum is σ = 205593352608. Its totient is φ = 200649482784.

The previous prime is 203121120109. The next prime is 203121120217. The reversal of 203121120113 is 311021121302.

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

It is not a de Polignac number, because 203121120113 - 2² = 203121120109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203121120091 and 203121120100.

It is not an unprimeable number, because it can be changed into a prime (203121120313) 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, 558245 + ... + 847277.

It is an arithmetic number, because the mean of its divisors is an integer number (25699169076).

Almost surely, 2^203121120113 is an apocalyptic number.

It is an amenable number.

203121120113 is a deficient number, since it is larger than the sum of its proper divisors (2472232495).

203121120113 is an equidigital number, since it uses as much as digits as its factorization.

203121120113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297583.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 203121120113 its reverse (311021121302), we get a palindrome (514142241415).

The spelling of 203121120113 in words is "two hundred three billion, one hundred twenty-one million, one hundred twenty thousand, one hundred thirteen".