131322203021 has 4 divisors (see below), whose sum is σ = 132158650332. Its totient is φ = 130485755712.

The previous prime is 131322202997. The next prime is 131322203071. The reversal of 131322203021 is 120302223131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120302223131 = 2767 ⋅43477493.

It can be written as a sum of positive squares in 2 ways, for example, as 13130638921 + 118191564100 = 114589^2 + 343790^2 .

It is a cyclic number.

It is not a de Polignac number, because 131322203021 - 2¹⁴ = 131322186637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131322202984 and 131322203002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131322203071) 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, 418223420 + ... + 418223733.

It is an arithmetic number, because the mean of its divisors is an integer number (33039662583).

Almost surely, 2^131322203021 is an apocalyptic number.

It is an amenable number.

131322203021 is a deficient number, since it is larger than the sum of its proper divisors (836447311).

131322203021 is an equidigital number, since it uses as much as digits as its factorization.

131322203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836447310.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 131322203021 its reverse (120302223131), we get a palindrome (251624426152).

The spelling of 131322203021 in words is "one hundred thirty-one billion, three hundred twenty-two million, two hundred three thousand, twenty-one".