131120221 has 4 divisors (see below), whose sum is σ = 131151744. Its totient is φ = 131088700.

The previous prime is 131120219. The next prime is 131120233. The reversal of 131120221 is 122021131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122021131 = 389 ⋅313679.

It is a cyclic number.

It is not a de Polignac number, because 131120221 - 2¹ = 131120219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131120021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8365 + ... + 18226.

It is an arithmetic number, because the mean of its divisors is an integer number (32787936).

Almost surely, 2^131120221 is an apocalyptic number.

It is an amenable number.

131120221 is a deficient number, since it is larger than the sum of its proper divisors (31523).

131120221 is an equidigital number, since it uses as much as digits as its factorization.

131120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31522.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 131120221 is about 11450.7738166466. The cubic root of 131120221 is about 508.0306223403.

Adding to 131120221 its reverse (122021131), we get a palindrome (253141352).

The spelling of 131120221 in words is "one hundred thirty-one million, one hundred twenty thousand, two hundred twenty-one".