31123133341 has 4 divisors (see below), whose sum is σ = 31128493212. Its totient is φ = 31117773472.

The previous prime is 31123133339. The next prime is 31123133347. The reversal of 31123133341 is 14333132113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14333132113 = 37 ⋅387381949.

It can be written as a sum of positive squares in 2 ways, for example, as 16446780025 + 14676353316 = 128245^2 + 121146^2 .

It is a cyclic number.

It is not a de Polignac number, because 31123133341 - 2¹ = 31123133339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123133347) 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, 2671216 + ... + 2682841.

It is an arithmetic number, because the mean of its divisors is an integer number (7782123303).

Almost surely, 2^31123133341 is an apocalyptic number.

It is an amenable number.

31123133341 is a deficient number, since it is larger than the sum of its proper divisors (5359871).

31123133341 is an equidigital number, since it uses as much as digits as its factorization.

31123133341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359870.

The product of its digits is 1944, while the sum is 25.

Adding to 31123133341 its reverse (14333132113), we get a palindrome (45456265454).

The spelling of 31123133341 in words is "thirty-one billion, one hundred twenty-three million, one hundred thirty-three thousand, three hundred forty-one".