203140330021 has 4 divisors (see below), whose sum is σ = 203715798732. Its totient is φ = 202564861312.

The previous prime is 203140329989. The next prime is 203140330069. The reversal of 203140330021 is 120033041302.

203140330021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120033041302 = 2 ⋅60016520651.

It can be written as a sum of positive squares in 2 ways, for example, as 42812161921 + 160328168100 = 206911^2 + 400410^2 .

It is a cyclic number.

It is not a de Polignac number, because 203140330021 - 2⁵ = 203140329989 is a prime.

It is a super-3 number, since 3×203140330021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203140330721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287733826 + ... + 287734531.

It is an arithmetic number, because the mean of its divisors is an integer number (50928949683).

Almost surely, 2^203140330021 is an apocalyptic number.

It is an amenable number.

203140330021 is a deficient number, since it is larger than the sum of its proper divisors (575468711).

203140330021 is an equidigital number, since it uses as much as digits as its factorization.

203140330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575468710.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203140330021 its reverse (120033041302), we get a palindrome (323173371323).

The spelling of 203140330021 in words is "two hundred three billion, one hundred forty million, three hundred thirty thousand, twenty-one".