212231322131 has 4 divisors (see below), whose sum is σ = 212232698832. Its totient is φ = 212229945432.

The previous prime is 212231322073. The next prime is 212231322139. The reversal of 212231322131 is 131223132212.

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 212231322131 - 2¹⁴ = 212231305747 is a prime.

It is a super-2 number, since 2×212231322131² (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 = 212231322097 and 212231322106.

It is not an unprimeable number, because it can be changed into a prime (212231322139) 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, 423020 + ... + 776793.

It is an arithmetic number, because the mean of its divisors is an integer number (53058174708).

Almost surely, 2^212231322131 is an apocalyptic number.

212231322131 is a deficient number, since it is larger than the sum of its proper divisors (1376701).

212231322131 is a wasteful number, since it uses less digits than its factorization.

212231322131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376700.

The product of its digits is 864, while the sum is 23.

Adding to 212231322131 its reverse (131223132212), we get a palindrome (343454454343).

The spelling of 212231322131 in words is "two hundred twelve billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred thirty-one".