10203434421 has 4 divisors (see below), whose sum is σ = 13604579232. Its totient is φ = 6802289612.

The previous prime is 10203434413. The next prime is 10203434429. The reversal of 10203434421 is 12443430201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10203434413) and next prime (10203434429).

It is a cyclic number.

It is not a de Polignac number, because 10203434421 - 2³ = 10203434413 is a prime.

It is a super-2 number, since 2×10203434421² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10203434391 and 10203434400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203434429) 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, 1700572401 + ... + 1700572406.

It is an arithmetic number, because the mean of its divisors is an integer number (3401144808).

Almost surely, 2^10203434421 is an apocalyptic number.

It is an amenable number.

10203434421 is a deficient number, since it is larger than the sum of its proper divisors (3401144811).

10203434421 is an equidigital number, since it uses as much as digits as its factorization.

10203434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401144810.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 10203434421 its reverse (12443430201), we get a palindrome (22646864622).

The spelling of 10203434421 in words is "ten billion, two hundred three million, four hundred thirty-four thousand, four hundred twenty-one".