240401321021 has 4 divisors (see below), whose sum is σ = 240410182944. Its totient is φ = 240392459100.

The previous prime is 240401321011. The next prime is 240401321023. The reversal of 240401321021 is 120123104042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240401321021 - 2¹⁰ = 240401319997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 240401320984 and 240401321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240401321023) 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, 4390145 + ... + 4444566.

It is an arithmetic number, because the mean of its divisors is an integer number (60102545736).

Almost surely, 2^240401321021 is an apocalyptic number.

It is an amenable number.

240401321021 is a deficient number, since it is larger than the sum of its proper divisors (8861923).

240401321021 is an equidigital number, since it uses as much as digits as its factorization.

240401321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861922.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 240401321021 its reverse (120123104042), we get a palindrome (360524425063).

The spelling of 240401321021 in words is "two hundred forty billion, four hundred one million, three hundred twenty-one thousand, twenty-one".