131112213221 has 4 divisors (see below), whose sum is σ = 143031505344. Its totient is φ = 119192921100.

The previous prime is 131112213203. The next prime is 131112213233. The reversal of 131112213221 is 122312211131.

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.

It is not a de Polignac number, because 131112213221 - 2⁶ = 131112213157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131112213193 and 131112213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131112213241) 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, 5959646045 + ... + 5959646066.

It is an arithmetic number, because the mean of its divisors is an integer number (35757876336).

Almost surely, 2^131112213221 is an apocalyptic number.

131112213221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131112213221 is a deficient number, since it is larger than the sum of its proper divisors (11919292123).

131112213221 is a wasteful number, since it uses less digits than its factorization.

131112213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11919292122.

The product of its digits is 144, while the sum is 20.

Adding to 131112213221 its reverse (122312211131), we get a palindrome (253424424352).

The spelling of 131112213221 in words is "one hundred thirty-one billion, one hundred twelve million, two hundred thirteen thousand, two hundred twenty-one".