131222122 has 4 divisors (see below), whose sum is σ = 196833186. Its totient is φ = 65611060.

The previous prime is 131222093. The next prime is 131222123. The reversal of 131222122 is 221222131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131125401 + 96721 = 11451^2 + 311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131222096 and 131222105.

It is not an unprimeable number, because it can be changed into a prime (131222123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32805529 + ... + 32805532.

Almost surely, 2^131222122 is an apocalyptic number.

131222122 is a deficient number, since it is larger than the sum of its proper divisors (65611064).

131222122 is an equidigital number, since it uses as much as digits as its factorization.

131222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65611063.

The product of its digits is 96, while the sum is 16.

The square root of 131222122 is about 11455.2224771062. Note that the first 3 decimals coincide. The cubic root of 131222122 is about 508.1621947833.

Adding to 131222122 its reverse (221222131), we get a palindrome (352444253).

Subtracting 131222122 from its reverse (221222131), we obtain a palindrome (90000009).

The spelling of 131222122 in words is "one hundred thirty-one million, two hundred twenty-two thousand, one hundred twenty-two".