4041221220421 has 32 divisors (see below), whose sum is σ = 5169627353088. Its totient is φ = 3067389138240.

The previous prime is 4041221220409. The next prime is 4041221220467. The reversal of 4041221220421 is 1240221221404.

4041221220421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4041221220421 - 2⁹ = 4041221219909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4041221220121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447730 + ... + 2878003.

It is an arithmetic number, because the mean of its divisors is an integer number (161550854784).

Almost surely, 2^{4041221220421} is an apocalyptic number.

It is an amenable number.

4041221220421 is a deficient number, since it is larger than the sum of its proper divisors (1128406132667).

4041221220421 is a wasteful number, since it uses less digits than its factorization.

4041221220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326161.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 4041221220421 its reverse (1240221221404), we get a palindrome (5281442441825).

The spelling of 4041221220421 in words is "four trillion, forty-one billion, two hundred twenty-one million, two hundred twenty thousand, four hundred twenty-one".