131030023021 has 8 divisors (see below), whose sum is σ = 139539626424. Its totient is φ = 122609525760.

The previous prime is 131030023013. The next prime is 131030023031. The reversal of 131030023021 is 120320030131.

It can be written as a sum of positive squares in 4 ways, for example, as 58728190921 + 72301832100 = 242339^2 + 268890^2 .

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 131030023021 - 2³ = 131030023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131030022986 and 131030023004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131030023031) 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, 22273500 + ... + 22279381.

It is an arithmetic number, because the mean of its divisors is an integer number (17442453303).

Almost surely, 2^131030023021 is an apocalyptic number.

It is an amenable number.

131030023021 is a deficient number, since it is larger than the sum of its proper divisors (8509603403).

131030023021 is a wasteful number, since it uses less digits than its factorization.

131030023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44553071.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 131030023021 its reverse (120320030131), we get a palindrome (251350053152).

The spelling of 131030023021 in words is "one hundred thirty-one billion, thirty million, twenty-three thousand, twenty-one".