131221433422 has 16 divisors (see below), whose sum is σ = 205444864512. Its totient is φ = 62741334040.

The previous prime is 131221433411. The next prime is 131221433423. The reversal of 131221433422 is 224334122131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221433423) 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, 205354 + ... + 551917.

It is an arithmetic number, because the mean of its divisors is an integer number (12840304032).

Almost surely, 2^131221433422 is an apocalyptic number.

131221433422 is a deficient number, since it is larger than the sum of its proper divisors (74223431090).

131221433422 is a wasteful number, since it uses less digits than its factorization.

131221433422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761063.

The product of its digits is 6912, while the sum is 28.

Adding to 131221433422 its reverse (224334122131), we get a palindrome (355555555553).

The spelling of 131221433422 in words is "one hundred thirty-one billion, two hundred twenty-one million, four hundred thirty-three thousand, four hundred twenty-two".