131221240412194 has 48 divisors (see below), whose sum is σ = 213051774191256. Its totient is φ = 60570623001600.

The previous prime is 131221240412117. The next prime is 131221240412231. The reversal of 131221240412194 is 491214042122131.

It can be written as a sum of positive squares in 4 ways, for example, as 126678694156569 + 4542546255625 = 11255163^2 + 2131325^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22782654 + ... + 27955174.

Almost surely, 2^{131221240412194} is an apocalyptic number.

131221240412194 is a deficient number, since it is larger than the sum of its proper divisors (81830533779062).

131221240412194 is a wasteful number, since it uses less digits than its factorization.

131221240412194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173459 (or 5173440 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 131221240412194 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, two hundred forty million, four hundred twelve thousand, one hundred ninety-four".