31212033133 has 16 divisors (see below), whose sum is σ = 33566158080. Its totient is φ = 28917697536.

The previous prime is 31212033113. The next prime is 31212033161. The reversal of 31212033133 is 33133021213.

It is a cyclic number.

It is not a de Polignac number, because 31212033133 - 2⁵ = 31212033101 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 (31212033113) 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 15 ways as a sum of consecutive naturals, for example, 418110 + ... + 487072.

It is an arithmetic number, because the mean of its divisors is an integer number (2097884880).

Almost surely, 2^31212033133 is an apocalyptic number.

It is an amenable number.

31212033133 is a deficient number, since it is larger than the sum of its proper divisors (2354124947).

31212033133 is a wasteful number, since it uses less digits than its factorization.

31212033133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69396.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31212033133 its reverse (33133021213), we get a palindrome (64345054346).

The spelling of 31212033133 in words is "thirty-one billion, two hundred twelve million, thirty-three thousand, one hundred thirty-three".