33131012213 has 16 divisors (see below), whose sum is σ = 36924718320. Its totient is φ = 29516035584.

The previous prime is 33131012203. The next prime is 33131012221. The reversal of 33131012213 is 31221013133.

It can be written as a sum of positive squares in 8 ways, for example, as 535598449 + 32595413764 = 23143^2 + 180542^2 .

It is a cyclic number.

It is not a de Polignac number, because 33131012213 - 2⁶ = 33131012149 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 (33131012203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998945 + ... + 1031577.

It is an arithmetic number, because the mean of its divisors is an integer number (2307794895).

Almost surely, 2^33131012213 is an apocalyptic number.

It is an amenable number.

33131012213 is a deficient number, since it is larger than the sum of its proper divisors (3793706107).

33131012213 is a wasteful number, since it uses less digits than its factorization.

33131012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35368.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 33131012213 its reverse (31221013133), we get a palindrome (64352025346).

The spelling of 33131012213 in words is "thirty-three billion, one hundred thirty-one million, twelve thousand, two hundred thirteen".