203012132503021 has 4 divisors (see below), whose sum is σ = 203614542392092. Its totient is φ = 202409722613952.

The previous prime is 203012132502869. The next prime is 203012132503067. The reversal of 203012132503021 is 120305231210302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 74085441144100 + 128926691358921 = 8607290^2 + 11354589^2 .

It is a cyclic number.

It is not a de Polignac number, because 203012132503021 - 2²¹ = 203012130405869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203012132503421) 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, 301204944030 + ... + 301204944703.

It is an arithmetic number, because the mean of its divisors is an integer number (50903635598023).

Almost surely, 2^{203012132503021} is an apocalyptic number.

It is an amenable number.

203012132503021 is a deficient number, since it is larger than the sum of its proper divisors (602409889071).

203012132503021 is an equidigital number, since it uses as much as digits as its factorization.

203012132503021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602409889070.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 203012132503021 its reverse (120305231210302), we get a palindrome (323317363713323).

The spelling of 203012132503021 in words is "two hundred three trillion, twelve billion, one hundred thirty-two million, five hundred three thousand, twenty-one".