131222113221 has 8 divisors (see below), whose sum is σ = 175007364480. Its totient is φ = 87459135392.

The previous prime is 131222113199. The next prime is 131222113249. The reversal of 131222113221 is 122311222131.

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 131222113221 - 2¹⁸ = 131221851077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222113271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5554605 + ... + 5578178.

It is an arithmetic number, because the mean of its divisors is an integer number (21875920560).

Almost surely, 2^131222113221 is an apocalyptic number.

It is an amenable number.

131222113221 is a deficient number, since it is larger than the sum of its proper divisors (43785251259).

131222113221 is a wasteful number, since it uses less digits than its factorization.

131222113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136715.

The product of its digits is 288, while the sum is 21.

Adding to 131222113221 its reverse (122311222131), we get a palindrome (253533335352).

The spelling of 131222113221 in words is "one hundred thirty-one billion, two hundred twenty-two million, one hundred thirteen thousand, two hundred twenty-one".