421203422003 has 16 divisors (see below), whose sum is σ = 540943527936. Its totient is φ = 318770290080.

The previous prime is 421203421993. The next prime is 421203422063. The reversal of 421203422003 is 300224302124.

It is a cyclic number.

It is not a de Polignac number, because 421203422003 - 2¹² = 421203417907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 421203422003.

It is not an unprimeable number, because it can be changed into a prime (421203422063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100619843 + ... + 100624028.

It is an arithmetic number, because the mean of its divisors is an integer number (33808970496).

Almost surely, 2^421203422003 is an apocalyptic number.

421203422003 is a deficient number, since it is larger than the sum of its proper divisors (119740105933).

421203422003 is a wasteful number, since it uses less digits than its factorization.

421203422003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201243914.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 421203422003 its reverse (300224302124), we get a palindrome (721427724127).

The spelling of 421203422003 in words is "four hundred twenty-one billion, two hundred three million, four hundred twenty-two thousand, three".