203121104020113 has 16 divisors (see below), whose sum is σ = 273572851217600. Its totient is φ = 134044077182400.

The previous prime is 203121104020069. The next prime is 203121104020157. The reversal of 203121104020113 is 311020401121302.

It is an interprime number because it is at equal distance from previous prime (203121104020069) and next prime (203121104020157).

It is not a de Polignac number, because 203121104020113 - 2¹³ = 203121104011921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203121104020113.

It is not an unprimeable number, because it can be changed into a prime (203121104020193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295167958 + ... + 295855311.

It is an arithmetic number, because the mean of its divisors is an integer number (17098303201100).

Almost surely, 2^{203121104020113} is an apocalyptic number.

It is an amenable number.

203121104020113 is a deficient number, since it is larger than the sum of its proper divisors (70451747197487).

203121104020113 is a wasteful number, since it uses less digits than its factorization.

203121104020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591024432.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 203121104020113 its reverse (311020401121302), we get a palindrome (514141505141415).

The spelling of 203121104020113 in words is "two hundred three trillion, one hundred twenty-one billion, one hundred four million, twenty thousand, one hundred thirteen".