212031233131 has 4 divisors (see below), whose sum is σ = 217202726664. Its totient is φ = 206859739600.

The previous prime is 212031233123. The next prime is 212031233149. The reversal of 212031233131 is 131332130212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212031233131 - 2³ = 212031233123 is a prime.

It is a super-2 number, since 2×212031233131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212031233111) 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, 2585746705 + ... + 2585746786.

It is an arithmetic number, because the mean of its divisors is an integer number (54300681666).

Almost surely, 2^212031233131 is an apocalyptic number.

212031233131 is a deficient number, since it is larger than the sum of its proper divisors (5171493533).

212031233131 is an equidigital number, since it uses as much as digits as its factorization.

212031233131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171493532.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 212031233131 its reverse (131332130212), we get a palindrome (343363363343).

The spelling of 212031233131 in words is "two hundred twelve billion, thirty-one million, two hundred thirty-three thousand, one hundred thirty-one".