602240021281 has 4 divisors (see below), whose sum is σ = 602257868100. Its totient is φ = 602222174464.

The previous prime is 602240021269. The next prime is 602240021309. The reversal of 602240021281 is 182120042206.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182120042206 = 2 ⋅91060021103.

It can be written as a sum of positive squares in 2 ways, for example, as 388596390625 + 213643630656 = 623375^2 + 462216^2 .

It is a cyclic number.

It is not a de Polignac number, because 602240021281 - 2⁵ = 602240021249 is a prime.

It is a super-2 number, since 2×602240021281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (602240021221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8872696 + ... + 8940313.

It is an arithmetic number, because the mean of its divisors is an integer number (150564467025).

Almost surely, 2^602240021281 is an apocalyptic number.

It is an amenable number.

602240021281 is a deficient number, since it is larger than the sum of its proper divisors (17846819).

602240021281 is a wasteful number, since it uses less digits than its factorization.

602240021281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17846818.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 602240021281 its reverse (182120042206), we get a palindrome (784360063487).

The spelling of 602240021281 in words is "six hundred two billion, two hundred forty million, twenty-one thousand, two hundred eighty-one".