131121255 has 16 divisors (see below), whose sum is σ = 222135264. Its totient is φ = 65817600.

The previous prime is 131121253. The next prime is 131121271. The reversal of 131121255 is 552121131.

It is not a de Polignac number, because 131121255 - 2¹ = 131121253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256846 + ... + 257355.

It is an arithmetic number, because the mean of its divisors is an integer number (13883454).

Almost surely, 2^131121255 is an apocalyptic number.

131121255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131121255 is a deficient number, since it is larger than the sum of its proper divisors (91014009).

131121255 is a wasteful number, since it uses less digits than its factorization.

131121255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514226.

The product of its digits is 300, while the sum is 21.

The square root of 131121255 is about 11450.8189663447. The cubic root of 131121255 is about 508.0319577618.

Adding to 131121255 its reverse (552121131), we get a palindrome (683242386).

The spelling of 131121255 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred fifty-five".