131021212231 has 8 divisors (see below), whose sum is σ = 161256876704. Its totient is φ = 103665134880.

The previous prime is 131021212229. The next prime is 131021212237. The reversal of 131021212231 is 132212120131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131021212231 - 2¹ = 131021212229 is a prime.

It is a super-2 number, since 2×131021212231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131021212199 and 131021212208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021212237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719896680 + ... + 719896861.

It is an arithmetic number, because the mean of its divisors is an integer number (20157109588).

Almost surely, 2^131021212231 is an apocalyptic number.

131021212231 is a deficient number, since it is larger than the sum of its proper divisors (30235664473).

131021212231 is a wasteful number, since it uses less digits than its factorization.

131021212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439793561.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131021212231 its reverse (132212120131), we get a palindrome (263233332362).

The spelling of 131021212231 in words is "one hundred thirty-one billion, twenty-one million, two hundred twelve thousand, two hundred thirty-one".