4221000401 has 4 divisors (see below), whose sum is σ = 4300641972. Its totient is φ = 4141358832.

The previous prime is 4221000391. The next prime is 4221000451. The reversal of 4221000401 is 1040001224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2759926225 + 1461074176 = 52535^2 + 38224^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221000401 - 2³⁰ = 3147258577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221000451) 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, 39820706 + ... + 39820811.

It is an arithmetic number, because the mean of its divisors is an integer number (1075160493).

Almost surely, 2^4221000401 is an apocalyptic number.

It is an amenable number.

4221000401 is a deficient number, since it is larger than the sum of its proper divisors (79641571).

4221000401 is an equidigital number, since it uses as much as digits as its factorization.

4221000401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79641570.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4221000401 is about 64969.2265691997. The cubic root of 4221000401 is about 1616.1132756072.

Adding to 4221000401 its reverse (1040001224), we get a palindrome (5261001625).

The spelling of 4221000401 in words is "four billion, two hundred twenty-one million, four hundred one", and thus it is an aban number.