131203332121 has 4 divisors (see below), whose sum is σ = 131211274932. Its totient is φ = 131195389312.

The previous prime is 131203332119. The next prime is 131203332131. The reversal of 131203332121 is 121233302131.

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 125908586896 + 5294745225 = 354836^2 + 72765^2 .

It is a cyclic number.

It is not a de Polignac number, because 131203332121 - 2¹ = 131203332119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131203332092 and 131203332101.

It is not an unprimeable number, because it can be changed into a prime (131203332131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3946576 + ... + 3979681.

It is an arithmetic number, because the mean of its divisors is an integer number (32802818733).

Almost surely, 2^131203332121 is an apocalyptic number.

It is an amenable number.

131203332121 is a deficient number, since it is larger than the sum of its proper divisors (7942811).

131203332121 is an equidigital number, since it uses as much as digits as its factorization.

131203332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7942810.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131203332121 its reverse (121233302131), we get a palindrome (252436634252).

It can be divided in two parts, 13120 and 3332121, that added together give a square (3345241 = 1829²).

The spelling of 131203332121 in words is "one hundred thirty-one billion, two hundred three million, three hundred thirty-two thousand, one hundred twenty-one".