10000421218 has 4 divisors (see below), whose sum is σ = 15000631830. Its totient is φ = 5000210608.

The previous prime is 10000421209. The next prime is 10000421251. The reversal of 10000421218 is 81212400001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81212400001 = 211 ⋅384892891.

It can be written as a sum of positive squares in only one way, i.e., 6717933369 + 3282487849 = 81963^2 + 57293^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10000421195 and 10000421204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500105303 + ... + 2500105306.

Almost surely, 2^10000421218 is an apocalyptic number.

10000421218 is a deficient number, since it is larger than the sum of its proper divisors (5000210612).

10000421218 is an equidigital number, since it uses as much as digits as its factorization.

10000421218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000210611.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10000421218 its reverse (81212400001), we get a palindrome (91212821219).

The spelling of 10000421218 in words is "ten billion, four hundred twenty-one thousand, two hundred eighteen".