31101313321 has 8 divisors (see below), whose sum is σ = 33520815944. Its totient is φ = 28685681280.

The previous prime is 31101313319. The next prime is 31101313333. The reversal of 31101313321 is 12331310113.

It can be written as a sum of positive squares in 4 ways, for example, as 9748797696 + 21352515625 = 98736^2 + 146125^2 .

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 31101313321 - 2¹ = 31101313319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31101313361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950940 + ... + 983101.

It is an arithmetic number, because the mean of its divisors is an integer number (4190101993).

Almost surely, 2^31101313321 is an apocalyptic number.

It is an amenable number.

31101313321 is a deficient number, since it is larger than the sum of its proper divisors (2419502623).

31101313321 is a wasteful number, since it uses less digits than its factorization.

31101313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935291.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31101313321 its reverse (12331310113), we get a palindrome (43432623434).

The spelling of 31101313321 in words is "thirty-one billion, one hundred one million, three hundred thirteen thousand, three hundred twenty-one".