4021440133441 has 4 divisors (see below), whose sum is σ = 4160110482900. Its totient is φ = 3882769783984.

The previous prime is 4021440133433. The next prime is 4021440133483. The reversal of 4021440133441 is 1443310441204.

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 1867308585025 + 2154131548416 = 1366495^2 + 1467696^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021440133441 - 2³ = 4021440133433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021440133141) 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, 69335174686 + ... + 69335174743.

It is an arithmetic number, because the mean of its divisors is an integer number (1040027620725).

Almost surely, 2^{4021440133441} is an apocalyptic number.

It is an amenable number.

4021440133441 is a deficient number, since it is larger than the sum of its proper divisors (138670349459).

4021440133441 is a wasteful number, since it uses less digits than its factorization.

4021440133441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138670349458.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 4021440133441 its reverse (1443310441204), we get a palindrome (5464750574645).

The spelling of 4021440133441 in words is "four trillion, twenty-one billion, four hundred forty million, one hundred thirty-three thousand, four hundred forty-one".