131121304513551 has 32 divisors (see below), whose sum is σ = 211929638999040. Its totient is φ = 79461299937600.

The previous prime is 131121304513523. The next prime is 131121304513627. The reversal of 131121304513551 is 155315403121131.

131121304513551 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 2 + 130 + 4 + 513 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 131121304513551 - 2¹⁴ = 131121304497167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121304513351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13262710 + ... + 20931843.

It is an arithmetic number, because the mean of its divisors is an integer number (6622801218720).

Almost surely, 2^{131121304513551} is an apocalyptic number.

131121304513551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131121304513551 is a deficient number, since it is larger than the sum of its proper divisors (80808334485489).

131121304513551 is a wasteful number, since it uses less digits than its factorization.

131121304513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34207484 (or 34207478 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

Adding to 131121304513551 its reverse (155315403121131), we get a palindrome (286436707634682).

The spelling of 131121304513551 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred four million, five hundred thirteen thousand, five hundred fifty-one".