321240531611 has 4 divisors (see below), whose sum is σ = 321430279632. Its totient is φ = 321050783592.

The previous prime is 321240531593. The next prime is 321240531617. The reversal of 321240531611 is 116135042123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321240531611 - 2²² = 321236337307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321240531617) 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, 94871471 + ... + 94874856.

It is an arithmetic number, because the mean of its divisors is an integer number (80357569908).

Almost surely, 2^321240531611 is an apocalyptic number.

321240531611 is a deficient number, since it is larger than the sum of its proper divisors (189748021).

321240531611 is a wasteful number, since it uses less digits than its factorization.

321240531611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189748020.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 321240531611 its reverse (116135042123), we get a palindrome (437375573734).

The spelling of 321240531611 in words is "three hundred twenty-one billion, two hundred forty million, five hundred thirty-one thousand, six hundred eleven".