131223131211 has 8 divisors (see below), whose sum is σ = 180997422480. Its totient is φ = 84465463712.

The previous prime is 131223131201. The next prime is 131223131243. The reversal of 131223131211 is 112131322131.

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 131223131211 - 2¹³ = 131223123019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131223131201) 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, 754155840 + ... + 754156013.

It is an arithmetic number, because the mean of its divisors is an integer number (22624677810).

Almost surely, 2^131223131211 is an apocalyptic number.

131223131211 is a deficient number, since it is larger than the sum of its proper divisors (49774291269).

131223131211 is a wasteful number, since it uses less digits than its factorization.

131223131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508311885.

The product of its digits is 216, while the sum is 21.

Adding to 131223131211 its reverse (112131322131), we get a palindrome (243354453342).

The spelling of 131223131211 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred eleven".