4540012144021 has 2 divisors, whose sum is σ = 4540012144022. Its totient is φ = 4540012144020.

The previous prime is 4540012143973. The next prime is 4540012144049. The reversal of 4540012144021 is 1204412100454.

It is a happy number.

It is an a-pointer prime, because the next prime (4540012144049) can be obtained adding 4540012144021 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4308588609796 + 231423534225 = 2075714^2 + 481065^2 .

It is a cyclic number.

It is not a de Polignac number, because 4540012144021 - 2⁹ = 4540012143509 is a prime.

It is a super-2 number, since 2×4540012144021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4540012144081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270006072010 + 2270006072011.

It is an arithmetic number, because the mean of its divisors is an integer number (2270006072011).

Almost surely, 2^{4540012144021} is an apocalyptic number.

It is an amenable number.

4540012144021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4540012144021 is an equidigital number, since it uses as much as digits as its factorization.

4540012144021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 4540012144021 its reverse (1204412100454), we get a palindrome (5744424244475).

The spelling of 4540012144021 in words is "four trillion, five hundred forty billion, twelve million, one hundred forty-four thousand, twenty-one".