203242100012531 has 4 divisors (see below), whose sum is σ = 203264831494464. Its totient is φ = 203219368530600.

The previous prime is 203242100012521. The next prime is 203242100012543. The reversal of 203242100012531 is 135210001242302.

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

It is a cyclic number.

It is not a de Polignac number, because 203242100012531 - 2¹⁰ = 203242100011507 is a prime.

It is a super-2 number, since 2×203242100012531² (a number of 29 digits) contains 22 as substring.

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 203242100012531.

It is not an unprimeable number, because it can be changed into a prime (203242100012521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11365727555 + ... + 11365745436.

It is an arithmetic number, because the mean of its divisors is an integer number (50816207873616).

Almost surely, 2^{203242100012531} is an apocalyptic number.

203242100012531 is a deficient number, since it is larger than the sum of its proper divisors (22731481933).

203242100012531 is an equidigital number, since it uses as much as digits as its factorization.

203242100012531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22731481932.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 203242100012531 its reverse (135210001242302), we get a palindrome (338452101254833).

The spelling of 203242100012531 in words is "two hundred three trillion, two hundred forty-two billion, one hundred million, twelve thousand, five hundred thirty-one".