212331031331 has 4 divisors (see below), whose sum is σ = 212332050072. Its totient is φ = 212330012592.

The previous prime is 212331031313. The next prime is 212331031349. The reversal of 212331031331 is 133130133212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (212331031313) and next prime (212331031349).

It is a cyclic number.

It is not a de Polignac number, because 212331031331 - 2¹⁸ = 212330769187 is a prime.

It is a super-2 number, since 2×212331031331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212331031297 and 212331031306.

It is not an unprimeable number, because it can be changed into a prime (212331031831) 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, 70946 + ... + 655511.

It is an arithmetic number, because the mean of its divisors is an integer number (53083012518).

Almost surely, 2^212331031331 is an apocalyptic number.

212331031331 is a deficient number, since it is larger than the sum of its proper divisors (1018741).

212331031331 is an equidigital number, since it uses as much as digits as its factorization.

212331031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018740.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 212331031331 its reverse (133130133212), we get a palindrome (345461164543).

The spelling of 212331031331 in words is "two hundred twelve billion, three hundred thirty-one million, thirty-one thousand, three hundred thirty-one".