131223121213 has 8 divisors (see below), whose sum is σ = 131527487360. Its totient is φ = 130918831200.

The previous prime is 131223121207. The next prime is 131223121223. The reversal of 131223121213 is 312121322131.

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

It is a cyclic number.

It is not a de Polignac number, because 131223121213 - 2⁵ = 131223121181 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 (131223121223) 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, 4854028 + ... + 4880986.

It is an arithmetic number, because the mean of its divisors is an integer number (16440935920).

Almost surely, 2^131223121213 is an apocalyptic number.

It is an amenable number.

131223121213 is a deficient number, since it is larger than the sum of its proper divisors (304366147).

131223121213 is a wasteful number, since it uses less digits than its factorization.

131223121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38067.

The product of its digits is 432, while the sum is 22.

Adding to 131223121213 its reverse (312121322131), we get a palindrome (443344443344).

The spelling of 131223121213 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred twenty-one thousand, two hundred thirteen".