131221342312412 has 96 divisors (see below), whose sum is σ = 257655134822400. Its totient is φ = 57971239424000.

The previous prime is 131221342312391. The next prime is 131221342312469. The reversal of 131221342312412 is 214213243122131.

It is a super-3 number, since 3×131221342312412³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117074789 + ... + 118190307.

It is an arithmetic number, because the mean of its divisors is an integer number (2683907654400).

Almost surely, 2^{131221342312412} is an apocalyptic number.

It is an amenable number.

131221342312412 is a deficient number, since it is larger than the sum of its proper divisors (126433792509988).

131221342312412 is a wasteful number, since it uses less digits than its factorization.

131221342312412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116107 (or 1116105 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

Adding to 131221342312412 its reverse (214213243122131), we get a palindrome (345434585434543).

The spelling of 131221342312412 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred forty-two million, three hundred twelve thousand, four hundred twelve".