131121223 has 8 divisors (see below), whose sum is σ = 139290800. Its totient is φ = 123078528.

The previous prime is 131121181. The next prime is 131121241. The reversal of 131121223 is 322121131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131121223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131121197 and 131121206.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29586 + ... + 33727.

It is an arithmetic number, because the mean of its divisors is an integer number (17411350).

Almost surely, 2^131121223 is an apocalyptic number.

131121223 is a deficient number, since it is larger than the sum of its proper divisors (8169577).

131121223 is a wasteful number, since it uses less digits than its factorization.

131121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63441.

The product of its digits is 72, while the sum is 16.

The square root of 131121223 is about 11450.8175690647. The cubic root of 131121223 is about 508.0319164336.

Adding to 131121223 its reverse (322121131), we get a palindrome (453242354).

The spelling of 131121223 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-three".