131124013021 has 4 divisors (see below), whose sum is σ = 131126424444. Its totient is φ = 131121601600.

The previous prime is 131124012953. The next prime is 131124013037. The reversal of 131124013021 is 120310421131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82721812996 + 48402200025 = 287614^2 + 220005^2 .

It is a cyclic number.

It is not a de Polignac number, because 131124013021 - 2¹⁹ = 131123488733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131124013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131124013051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1122220 + ... + 1233541.

It is an arithmetic number, because the mean of its divisors is an integer number (32781606111).

Almost surely, 2^131124013021 is an apocalyptic number.

It is an amenable number.

131124013021 is a deficient number, since it is larger than the sum of its proper divisors (2411423).

131124013021 is an equidigital number, since it uses as much as digits as its factorization.

131124013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411422.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131124013021 its reverse (120310421131), we get a palindrome (251434434152).

The spelling of 131124013021 in words is "one hundred thirty-one billion, one hundred twenty-four million, thirteen thousand, twenty-one".