131121205045444 has 48 divisors (see below), whose sum is σ = 237899556301680. Its totient is φ = 63160044147200.

The previous prime is 131121205045417. The next prime is 131121205045507. The reversal of 131121205045444 is 444540502121131.

It can be written as a sum of positive squares in 8 ways, for example, as 4538229217344 + 126582975828100 = 2130312^2 + 11250910^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103209174 + ... + 104471890.

It is an arithmetic number, because the mean of its divisors is an integer number (4956240756285).

Almost surely, 2^{131121205045444} is an apocalyptic number.

It is an amenable number.

131121205045444 is a deficient number, since it is larger than the sum of its proper divisors (106778351256236).

131121205045444 is a wasteful number, since it uses less digits than its factorization.

131121205045444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264728 (or 1264726 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

Adding to 131121205045444 its reverse (444540502121131), we get a palindrome (575661707166575).

The spelling of 131121205045444 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, two hundred five million, forty-five thousand, four hundred forty-four".