131223000301021 has 16 divisors (see below), whose sum is σ = 135078956737200. Its totient is φ = 127418190501888.

The previous prime is 131223000301013. The next prime is 131223000301039. The reversal of 131223000301021 is 120103000322131.

It can be written as a sum of positive squares in 8 ways, for example, as 19030629732921 + 112192370568100 = 4362411^2 + 10592090^2 .

It is a cyclic number.

It is not a de Polignac number, because 131223000301021 - 2³ = 131223000301013 is a prime.

It is a super-2 number, since 2×131223000301021² (a number of 29 digits) contains 22 as substring.

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 131223000301021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223000301621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702727615 + ... + 702914323.

It is an arithmetic number, because the mean of its divisors is an integer number (8442434796075).

Almost surely, 2^{131223000301021} is an apocalyptic number.

It is an amenable number.

131223000301021 is a deficient number, since it is larger than the sum of its proper divisors (3855956436179).

131223000301021 is a wasteful number, since it uses less digits than its factorization.

131223000301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323568.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131223000301021 its reverse (120103000322131), we get a palindrome (251326000623152).

The spelling of 131223000301021 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, three hundred one thousand, twenty-one".