131221440276 has 24 divisors (see below), whose sum is σ = 319495681344. Its totient is φ = 41838720000.

The previous prime is 131221440271. The next prime is 131221440277. The reversal of 131221440276 is 672044122131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221440271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237719725 + ... + 237720276.

It is an arithmetic number, because the mean of its divisors is an integer number (13312320056).

Almost surely, 2^131221440276 is an apocalyptic number.

It is an amenable number.

131221440276 is an abundant number, since it is smaller than the sum of its proper divisors (188274241068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131221440276 is a wasteful number, since it uses less digits than its factorization.

131221440276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475440031 (or 475440029 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 131221440276 in words is "one hundred thirty-one billion, two hundred twenty-one million, four hundred forty thousand, two hundred seventy-six".