4021431401441 has 4 divisors (see below), whose sum is σ = 4021435780500. Its totient is φ = 4021427022384.

The previous prime is 4021431401431. The next prime is 4021431401513. The reversal of 4021431401441 is 1441041341204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1663916825041 + 2357514576400 = 1289929^2 + 1535420^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021431401441 - 2¹⁰ = 4021431400417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4021431401431) 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, 223706 + ... + 2844803.

It is an arithmetic number, because the mean of its divisors is an integer number (1005358945125).

Almost surely, 2^{4021431401441} is an apocalyptic number.

It is an amenable number.

4021431401441 is a deficient number, since it is larger than the sum of its proper divisors (4379059).

4021431401441 is a wasteful number, since it uses less digits than its factorization.

4021431401441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379058.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 4021431401441 its reverse (1441041341204), we get a palindrome (5462472742645).

The spelling of 4021431401441 in words is "four trillion, twenty-one billion, four hundred thirty-one million, four hundred one thousand, four hundred forty-one".