200421103431 has 4 divisors (see below), whose sum is σ = 267228137912. Its totient is φ = 133614068952.

The previous prime is 200421103429. The next prime is 200421103507. The reversal of 200421103431 is 134301124002.

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

It is not a de Polignac number, because 200421103431 - 2¹ = 200421103429 is a prime.

It is a super-2 number, since 2×200421103431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200421103398 and 200421103407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200421103331) 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, 33403517236 + ... + 33403517241.

It is an arithmetic number, because the mean of its divisors is an integer number (66807034478).

Almost surely, 2^200421103431 is an apocalyptic number.

200421103431 is a deficient number, since it is larger than the sum of its proper divisors (66807034481).

200421103431 is an equidigital number, since it uses as much as digits as its factorization.

200421103431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66807034480.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 200421103431 its reverse (134301124002), we get a palindrome (334722227433).

The spelling of 200421103431 in words is "two hundred billion, four hundred twenty-one million, one hundred three thousand, four hundred thirty-one".