321211540331 has 8 divisors (see below), whose sum is σ = 350798942784. Its totient is φ = 291688530120.

The previous prime is 321211540219. The next prime is 321211540367. The reversal of 321211540331 is 133045112123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321211540331 - 2²⁶ = 321144431467 is a prime.

It is a super-2 number, since 2×321211540331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321211540331.

It is not an unprimeable number, because it can be changed into a prime (321211540031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16087625 + ... + 16107578.

It is an arithmetic number, because the mean of its divisors is an integer number (43849867848).

Almost surely, 2^321211540331 is an apocalyptic number.

321211540331 is a deficient number, since it is larger than the sum of its proper divisors (29587402453).

321211540331 is a wasteful number, since it uses less digits than its factorization.

321211540331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32196121.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 321211540331 its reverse (133045112123), we get a palindrome (454256652454).

The spelling of 321211540331 in words is "three hundred twenty-one billion, two hundred eleven million, five hundred forty thousand, three hundred thirty-one".