131224042999 has 4 divisors (see below), whose sum is σ = 149970334864. Its totient is φ = 112477751136.

The previous prime is 131224042997. The next prime is 131224043011. The reversal of 131224042999 is 999240422131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131224042999 - 2¹ = 131224042997 is a prime.

It is a super-2 number, since 2×131224042999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131224042991) 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, 9373145922 + ... + 9373145935.

It is an arithmetic number, because the mean of its divisors is an integer number (37492583716).

Almost surely, 2^131224042999 is an apocalyptic number.

131224042999 is a deficient number, since it is larger than the sum of its proper divisors (18746291865).

131224042999 is an equidigital number, since it uses as much as digits as its factorization.

131224042999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18746291864.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 131224042999 in words is "one hundred thirty-one billion, two hundred twenty-four million, forty-two thousand, nine hundred ninety-nine".