131121213 has 8 divisors (see below), whose sum is σ = 177223488. Its totient is φ = 86216544.

The previous prime is 131121181. The next prime is 131121241. The reversal of 131121213 is 312121131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131121213 - 2⁵ = 131121181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131121192 and 131121201.

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 7 ways as a sum of consecutive naturals, for example, 299145 + ... + 299582.

It is an arithmetic number, because the mean of its divisors is an integer number (22152936).

Almost surely, 2^131121213 is an apocalyptic number.

It is an amenable number.

131121213 is a deficient number, since it is larger than the sum of its proper divisors (46102275).

131121213 is an equidigital number, since it uses as much as digits as its factorization.

131121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598803.

The product of its digits is 36, while the sum is 15.

The square root of 131121213 is about 11450.8171324146. The cubic root of 131121213 is about 508.0319035185.

Adding to 131121213 its reverse (312121131), we get a palindrome (443242344).

The spelling of 131121213 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred thirteen".