4240202312221 has 4 divisors (see below), whose sum is σ = 4241593001500. Its totient is φ = 4238811622944.

The previous prime is 4240202312207. The next prime is 4240202312237. The reversal of 4240202312221 is 1222132020424.

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 2775509352196 + 1464692960025 = 1665986^2 + 1210245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4240202312221 is a prime.

It is a super-3 number, since 3×4240202312221³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240202312261) 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, 695340066 + ... + 695346163.

It is an arithmetic number, because the mean of its divisors is an integer number (1060398250375).

Almost surely, 2^{4240202312221} is an apocalyptic number.

It is an amenable number.

4240202312221 is a deficient number, since it is larger than the sum of its proper divisors (1390689279).

4240202312221 is a wasteful number, since it uses less digits than its factorization.

4240202312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390689278.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 4240202312221 its reverse (1222132020424), we get a palindrome (5462334332645).

The spelling of 4240202312221 in words is "four trillion, two hundred forty billion, two hundred two million, three hundred twelve thousand, two hundred twenty-one".