1000000421003 has 2 divisors, whose sum is σ = 1000000421004. Its totient is φ = 1000000421002.

The previous prime is 1000000420997. The next prime is 1000000421023. The reversal of 1000000421003 is 3001240000001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000000421003 - 2¹⁴ = 1000000404619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000000421023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000210501 + 500000210502.

It is an arithmetic number, because the mean of its divisors is an integer number (500000210502).

Almost surely, 2^{1000000421003} is an apocalyptic number.

1000000421003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000421003 is an equidigital number, since it uses as much as digits as its factorization.

1000000421003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 1000000421003 its reverse (3001240000001), we get a palindrome (4001240421004).

The spelling of 1000000421003 in words is "one trillion, four hundred twenty-one thousand, three".