31212003331133 has 4 divisors (see below), whose sum is σ = 33048003527100. Its totient is φ = 29376003135168.

The previous prime is 31212003331111. The next prime is 31212003331193. The reversal of 31212003331133 is 33113330021213.

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 14535781506724 + 16676221824409 = 3812582^2 + 4083653^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212003331133 - 2⁴² = 26813956820029 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 (31212003331193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918000097958 + ... + 918000097991.

It is an arithmetic number, because the mean of its divisors is an integer number (8262000881775).

Almost surely, 2^{31212003331133} is an apocalyptic number.

It is an amenable number.

31212003331133 is a deficient number, since it is larger than the sum of its proper divisors (1836000195967).

31212003331133 is a wasteful number, since it uses less digits than its factorization.

31212003331133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836000195966.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31212003331133 its reverse (33113330021213), we get a palindrome (64325333352346).

The spelling of 31212003331133 in words is "thirty-one trillion, two hundred twelve billion, three million, three hundred thirty-one thousand, one hundred thirty-three".