131122205 has 4 divisors (see below), whose sum is σ = 157346652. Its totient is φ = 104897760.

The previous prime is 131122181. The next prime is 131122247. The reversal of 131122205 is 502221131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59567524 + 71554681 = 7718^2 + 8459^2 .

It is not a de Polignac number, because 131122205 - 2¹⁰ = 131121181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13112216 + ... + 13112225.

It is an arithmetic number, because the mean of its divisors is an integer number (39336663).

Almost surely, 2^131122205 is an apocalyptic number.

It is an amenable number.

131122205 is a deficient number, since it is larger than the sum of its proper divisors (26224447).

131122205 is an equidigital number, since it uses as much as digits as its factorization.

131122205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26224446.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 131122205 is about 11450.8604480187. The cubic root of 131122205 is about 508.0331846902.

Adding to 131122205 its reverse (502221131), we get a palindrome (633343336).

The spelling of 131122205 in words is "one hundred thirty-one million, one hundred twenty-two thousand, two hundred five".