131210346128 has 20 divisors (see below), whose sum is σ = 257076453420. Its totient is φ = 64868035584.

The previous prime is 131210346083. The next prime is 131210346131. The reversal of 131210346128 is 821643012131.

It can be written as a sum of positive squares in 2 ways, for example, as 93910376704 + 37299969424 = 306448^2 + 193132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131210346094 and 131210346103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46069625 + ... + 46072472.

It is an arithmetic number, because the mean of its divisors is an integer number (12853822671).

Almost surely, 2^131210346128 is an apocalyptic number.

It is an amenable number.

131210346128 is a deficient number, since it is larger than the sum of its proper divisors (125866107292).

131210346128 is an equidigital number, since it uses as much as digits as its factorization.

131210346128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92142194 (or 92142188 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

Adding to 131210346128 its reverse (821643012131), we get a palindrome (952853358259).

The spelling of 131210346128 in words is "one hundred thirty-one billion, two hundred ten million, three hundred forty-six thousand, one hundred twenty-eight".