240312322636021 has 4 divisors (see below), whose sum is σ = 241247390039532. Its totient is φ = 239377255232512.

The previous prime is 240312322635967. The next prime is 240312322636027. The reversal of 240312322636021 is 120636223213042.

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 136253676200625 + 104058646435396 = 11672775^2 + 10200914^2 .

It is a cyclic number.

It is not a de Polignac number, because 240312322636021 - 2¹⁷ = 240312322504949 is a prime.

It is a super-2 number, since 2×240312322636021² (a number of 30 digits) contains 22 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 (240312322636027) 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, 467533701370 + ... + 467533701883.

It is an arithmetic number, because the mean of its divisors is an integer number (60311847509883).

Almost surely, 2^{240312322636021} is an apocalyptic number.

It is an amenable number.

240312322636021 is a deficient number, since it is larger than the sum of its proper divisors (935067403511).

240312322636021 is an equidigital number, since it uses as much as digits as its factorization.

240312322636021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935067403510.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 240312322636021 its reverse (120636223213042), we get a palindrome (360948545849063).

The spelling of 240312322636021 in words is "two hundred forty trillion, three hundred twelve billion, three hundred twenty-two million, six hundred thirty-six thousand, twenty-one".