131220231230 has 32 divisors (see below), whose sum is σ = 257735247840. Its totient is φ = 47704145920.

The previous prime is 131220231229. The next prime is 131220231239. The reversal of 131220231230 is 32132022131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220231239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280382 + ... + 583998.

It is an arithmetic number, because the mean of its divisors is an integer number (8054226495).

Almost surely, 2^131220231230 is an apocalyptic number.

131220231230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131220231230 is a deficient number, since it is larger than the sum of its proper divisors (126515016610).

131220231230 is a wasteful number, since it uses less digits than its factorization.

131220231230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307564.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 131220231230 its reverse (32132022131), we get a palindrome (163352253361).

The spelling of 131220231230 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred thirty-one thousand, two hundred thirty".