31112213000321 has 4 divisors (see below), whose sum is σ = 31114140543444. Its totient is φ = 31110285457200.

The previous prime is 31112213000257. The next prime is 31112213000327. The reversal of 31112213000321 is 12300031221113.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6829394382721 + 24282818617600 = 2613311^2 + 4927760^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112213000321 - 2⁶ = 31112213000257 is a prime.

It is a super-2 number, since 2×31112213000321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31112213000293 and 31112213000302.

It is not an unprimeable number, because it can be changed into a prime (31112213000327) 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, 963747350 + ... + 963779631.

It is an arithmetic number, because the mean of its divisors is an integer number (7778535135861).

Almost surely, 2^{31112213000321} is an apocalyptic number.

It is an amenable number.

31112213000321 is a deficient number, since it is larger than the sum of its proper divisors (1927543123).

31112213000321 is a wasteful number, since it uses less digits than its factorization.

31112213000321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927543122.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31112213000321 its reverse (12300031221113), we get a palindrome (43412244221434).

The spelling of 31112213000321 in words is "thirty-one trillion, one hundred twelve billion, two hundred thirteen million, three hundred twenty-one", and thus it is an aban number.