31204212133 has 4 divisors (see below), whose sum is σ = 31599202240. Its totient is φ = 30809222028.

The previous prime is 31204212101. The next prime is 31204212139. The reversal of 31204212133 is 33121240213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33121240213 = 853 ⋅38829121.

It is a cyclic number.

It is not a de Polignac number, because 31204212133 - 2⁵ = 31204212101 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 (31204212139) 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, 197494935 + ... + 197495092.

It is an arithmetic number, because the mean of its divisors is an integer number (7899800560).

Almost surely, 2^31204212133 is an apocalyptic number.

It is an amenable number.

31204212133 is a deficient number, since it is larger than the sum of its proper divisors (394990107).

31204212133 is an equidigital number, since it uses as much as digits as its factorization.

31204212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394990106.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31204212133 its reverse (33121240213), we get a palindrome (64325452346).

The spelling of 31204212133 in words is "thirty-one billion, two hundred four million, two hundred twelve thousand, one hundred thirty-three".