131221230432144 has 20 divisors (see below), whose sum is σ = 338988178616496. Its totient is φ = 43740410144032.

The previous prime is 131221230432137. The next prime is 131221230432161. The reversal of 131221230432144 is 441234032122131.

It is a super-2 number, since 2×131221230432144² (a number of 29 digits) contains 22 as substring.

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, 1366887816954 + ... + 1366887817049.

Almost surely, 2^{131221230432144} is an apocalyptic number.

It is an amenable number.

131221230432144 is an abundant number, since it is smaller than the sum of its proper divisors (207766948184352).

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

131221230432144 is a wasteful number, since it uses less digits than its factorization.

131221230432144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733775634014 (or 2733775634008 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 131221230432144 its reverse (441234032122131), we get a palindrome (572455262554275).

The spelling of 131221230432144 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, four hundred thirty-two thousand, one hundred forty-four".