131223101222 has 4 divisors (see below), whose sum is σ = 196834651836. Its totient is φ = 65611550610.

The previous prime is 131223101197. The next prime is 131223101227. The reversal of 131223101222 is 222101322131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222101322131 = 13 ⋅17084717087.

It is a junction number, because it is equal to n+sod(n) for n = 131223101194 and 131223101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32805775304 + ... + 32805775307.

It is an arithmetic number, because the mean of its divisors is an integer number (49208662959).

Almost surely, 2^131223101222 is an apocalyptic number.

131223101222 is a deficient number, since it is larger than the sum of its proper divisors (65611550614).

131223101222 is an equidigital number, since it uses as much as digits as its factorization.

131223101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65611550613.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131223101222 its reverse (222101322131), we get a palindrome (353324423353).

The spelling of 131223101222 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred one thousand, two hundred twenty-two".