31440330012321 has 16 divisors (see below), whose sum is σ = 46771537510720. Its totient is φ = 20873248136640.

The previous prime is 31440330012271. The next prime is 31440330012361. The reversal of 31440330012321 is 12321003304413.

It is a happy number.

31440330012321 is a `hidden beast` number, since 3 + 1 + 4 + 4 + 0 + 330 + 0 + 1 + 2 + 321 = 666.

It is not a de Polignac number, because 31440330012321 - 2⁶ = 31440330012257 is a prime.

It is a super-2 number, since 2×31440330012321² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31440330012361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2415878695 + ... + 2415891708.

It is an arithmetic number, because the mean of its divisors is an integer number (2923221094420).

Almost surely, 2^{31440330012321} is an apocalyptic number.

It is an amenable number.

31440330012321 is a deficient number, since it is larger than the sum of its proper divisors (15331207498399).

31440330012321 is a wasteful number, since it uses less digits than its factorization.

31440330012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831770653 (or 4831770647 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31440330012321 its reverse (12321003304413), we get a palindrome (43761333316734).

The spelling of 31440330012321 in words is "thirty-one trillion, four hundred forty billion, three hundred thirty million, twelve thousand, three hundred twenty-one".