10203443021 has 8 divisors (see below), whose sum is σ = 10300338840. Its totient is φ = 10106607168.

The previous prime is 10203442981. The next prime is 10203443059. The reversal of 10203443021 is 12034430201.

10203443021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1219057225 + 8984385796 = 34915^2 + 94786^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10203443021 - 2²⁶ = 10136334157 is a prime.

It is a super-2 number, since 2×10203443021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10203442984 and 10203443002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203443071) 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, 374555 + ... + 400871.

It is an arithmetic number, because the mean of its divisors is an integer number (1287542355).

Almost surely, 2^10203443021 is an apocalyptic number.

It is an amenable number.

10203443021 is a deficient number, since it is larger than the sum of its proper divisors (96895819).

10203443021 is a wasteful number, since it uses less digits than its factorization.

10203443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29983.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 10203443021 its reverse (12034430201), we get a palindrome (22237873222).

The spelling of 10203443021 in words is "ten billion, two hundred three million, four hundred forty-three thousand, twenty-one".