131223120122 has 16 divisors (see below), whose sum is σ = 208428752232. Its totient is φ = 61747445760.

The previous prime is 131223120073. The next prime is 131223120137. The reversal of 131223120122 is 221021322131.

It can be written as a sum of positive squares in 4 ways, for example, as 130617910921 + 605209201 = 361411^2 + 24601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131223120094 and 131223120103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341708 + ... + 615800.

Almost surely, 2^131223120122 is an apocalyptic number.

131223120122 is a deficient number, since it is larger than the sum of its proper divisors (77205632110).

131223120122 is a wasteful number, since it uses less digits than its factorization.

131223120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288193.

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

Adding to 131223120122 its reverse (221021322131), we get a palindrome (352244442253).

The spelling of 131223120122 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred twenty thousand, one hundred twenty-two".